---
_id: '26284'
author:
- first_name: Dmitry
  full_name: Bagrets, Dmitry
  last_name: Bagrets
- first_name: Kun Woo
  full_name: Kim, Kun Woo
  last_name: Kim
- first_name: Sonja
  full_name: Barkhofen, Sonja
  id: '48188'
  last_name: Barkhofen
- first_name: Syamsundar
  full_name: De, Syamsundar
  last_name: De
- first_name: Jan
  full_name: Sperling, Jan
  id: '75127'
  last_name: Sperling
  orcid: 0000-0002-5844-3205
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Alexander
  full_name: Altland, Alexander
  last_name: Altland
- first_name: Tobias
  full_name: Micklitz, Tobias
  last_name: Micklitz
citation:
  ama: Bagrets D, Kim KW, Barkhofen S, et al. Probing the topological Anderson transition
    with quantum walks. <i>Physical Review Research</i>. Published online 2021. doi:<a
    href="https://doi.org/10.1103/physrevresearch.3.023183">10.1103/physrevresearch.3.023183</a>
  apa: Bagrets, D., Kim, K. W., Barkhofen, S., De, S., Sperling, J., Silberhorn, C.,
    Altland, A., &#38; Micklitz, T. (2021). Probing the topological Anderson transition
    with quantum walks. <i>Physical Review Research</i>. <a href="https://doi.org/10.1103/physrevresearch.3.023183">https://doi.org/10.1103/physrevresearch.3.023183</a>
  bibtex: '@article{Bagrets_Kim_Barkhofen_De_Sperling_Silberhorn_Altland_Micklitz_2021,
    title={Probing the topological Anderson transition with quantum walks}, DOI={<a
    href="https://doi.org/10.1103/physrevresearch.3.023183">10.1103/physrevresearch.3.023183</a>},
    journal={Physical Review Research}, author={Bagrets, Dmitry and Kim, Kun Woo and
    Barkhofen, Sonja and De, Syamsundar and Sperling, Jan and Silberhorn, Christine
    and Altland, Alexander and Micklitz, Tobias}, year={2021} }'
  chicago: Bagrets, Dmitry, Kun Woo Kim, Sonja Barkhofen, Syamsundar De, Jan Sperling,
    Christine Silberhorn, Alexander Altland, and Tobias Micklitz. “Probing the Topological
    Anderson Transition with Quantum Walks.” <i>Physical Review Research</i>, 2021.
    <a href="https://doi.org/10.1103/physrevresearch.3.023183">https://doi.org/10.1103/physrevresearch.3.023183</a>.
  ieee: 'D. Bagrets <i>et al.</i>, “Probing the topological Anderson transition with
    quantum walks,” <i>Physical Review Research</i>, 2021, doi: <a href="https://doi.org/10.1103/physrevresearch.3.023183">10.1103/physrevresearch.3.023183</a>.'
  mla: Bagrets, Dmitry, et al. “Probing the Topological Anderson Transition with Quantum
    Walks.” <i>Physical Review Research</i>, 2021, doi:<a href="https://doi.org/10.1103/physrevresearch.3.023183">10.1103/physrevresearch.3.023183</a>.
  short: D. Bagrets, K.W. Kim, S. Barkhofen, S. De, J. Sperling, C. Silberhorn, A.
    Altland, T. Micklitz, Physical Review Research (2021).
date_created: 2021-10-15T16:03:53Z
date_updated: 2023-04-20T15:07:12Z
department:
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '288'
- _id: '230'
- _id: '623'
- _id: '35'
doi: 10.1103/physrevresearch.3.023183
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
  issn:
  - 2643-1564
publication_status: published
status: public
title: Probing the topological Anderson transition with quantum walks
type: journal_article
user_id: '16199'
year: '2021'
...
---
_id: '29748'
author:
- first_name: Diana
  full_name: Slawig, Diana
  last_name: Slawig
- first_name: Markus
  full_name: Gruschwitz, Markus
  last_name: Gruschwitz
- first_name: Uwe
  full_name: Gerstmann, Uwe
  id: '171'
  last_name: Gerstmann
  orcid: 0000-0002-4476-223X
- first_name: Eva
  full_name: Rauls, Eva
  last_name: Rauls
- first_name: Christoph
  full_name: Tegenkamp, Christoph
  last_name: Tegenkamp
citation:
  ama: Slawig D, Gruschwitz M, Gerstmann U, Rauls E, Tegenkamp C. Adsorption and Reaction
    of PbPc on Hydrogenated Epitaxial Graphene. <i>The Journal of Physical Chemistry
    C</i>. 2021;125(36):20087-20093. doi:<a href="https://doi.org/10.1021/acs.jpcc.1c06320">10.1021/acs.jpcc.1c06320</a>
  apa: Slawig, D., Gruschwitz, M., Gerstmann, U., Rauls, E., &#38; Tegenkamp, C. (2021).
    Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene. <i>The Journal
    of Physical Chemistry C</i>, <i>125</i>(36), 20087–20093. <a href="https://doi.org/10.1021/acs.jpcc.1c06320">https://doi.org/10.1021/acs.jpcc.1c06320</a>
  bibtex: '@article{Slawig_Gruschwitz_Gerstmann_Rauls_Tegenkamp_2021, title={Adsorption
    and Reaction of PbPc on Hydrogenated Epitaxial Graphene}, volume={125}, DOI={<a
    href="https://doi.org/10.1021/acs.jpcc.1c06320">10.1021/acs.jpcc.1c06320</a>},
    number={36}, journal={The Journal of Physical Chemistry C}, publisher={American
    Chemical Society (ACS)}, author={Slawig, Diana and Gruschwitz, Markus and Gerstmann,
    Uwe and Rauls, Eva and Tegenkamp, Christoph}, year={2021}, pages={20087–20093}
    }'
  chicago: 'Slawig, Diana, Markus Gruschwitz, Uwe Gerstmann, Eva Rauls, and Christoph
    Tegenkamp. “Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene.”
    <i>The Journal of Physical Chemistry C</i> 125, no. 36 (2021): 20087–93. <a href="https://doi.org/10.1021/acs.jpcc.1c06320">https://doi.org/10.1021/acs.jpcc.1c06320</a>.'
  ieee: 'D. Slawig, M. Gruschwitz, U. Gerstmann, E. Rauls, and C. Tegenkamp, “Adsorption
    and Reaction of PbPc on Hydrogenated Epitaxial Graphene,” <i>The Journal of Physical
    Chemistry C</i>, vol. 125, no. 36, pp. 20087–20093, 2021, doi: <a href="https://doi.org/10.1021/acs.jpcc.1c06320">10.1021/acs.jpcc.1c06320</a>.'
  mla: Slawig, Diana, et al. “Adsorption and Reaction of PbPc on Hydrogenated Epitaxial
    Graphene.” <i>The Journal of Physical Chemistry C</i>, vol. 125, no. 36, American
    Chemical Society (ACS), 2021, pp. 20087–93, doi:<a href="https://doi.org/10.1021/acs.jpcc.1c06320">10.1021/acs.jpcc.1c06320</a>.
  short: D. Slawig, M. Gruschwitz, U. Gerstmann, E. Rauls, C. Tegenkamp, The Journal
    of Physical Chemistry C 125 (2021) 20087–20093.
date_created: 2022-02-03T15:37:32Z
date_updated: 2023-04-20T16:04:22Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '35'
- _id: '790'
doi: 10.1021/acs.jpcc.1c06320
intvolume: '       125'
issue: '36'
keyword:
- Surfaces
- Coatings and Films
- Physical and Theoretical Chemistry
- General Energy
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
page: 20087-20093
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '53'
  name: 'TRR 142: TRR 142'
- _id: '55'
  name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '69'
  name: 'TRR 142 - B4: TRR 142 - Subproject B4'
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: The Journal of Physical Chemistry C
publication_identifier:
  issn:
  - 1932-7447
  - 1932-7455
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Adsorption and Reaction of PbPc on Hydrogenated Epitaxial Graphene
type: journal_article
user_id: '16199'
volume: 125
year: '2021'
...
---
_id: '37331'
abstract:
- lang: eng
  text: <jats:p>High harmonic generation (HHG) from solids shows great application
    prospects in compact short-wavelength light sources and as a tool for imaging
    the dynamics in crystals with subnanometer spatial and attosecond temporal resolution.
    However, the underlying collision dynamics behind solid HHG is still intensively
    debated and no direct mapping relationship between the collision dynamics with
    band structure has been built. Here, we show that the electron and its associated
    hole can be elastically scattered by neighboring atoms when their wavelength approaches
    the atomic size. We reveal that the elastic scattering of electron/hole from neighboring
    atoms can dramatically influence the electron recombination with its left-behind
    hole, which turns out to be the fundamental reason for the anisotropic interband
    HHG observed recently in bulk crystals. Our findings link the electron/hole backward
    scattering with Van Hove singularities and forward scattering with critical lines
    in the band structure and thus build a clear mapping between the band structure
    and the harmonic spectrum. Our work provides a unifying picture for several seemingly
    unrelated experimental observations and theoretical predictions, including the
    anisotropic harmonic emission in MgO, the atomic-like recollision mechanism of
    solid HHG, and the delocalization of HHG in ZnO. This strongly improved understanding
    will pave the way for controlling the solid-state HHG and visualizing the structure-dependent
    electron dynamics in solids.</jats:p>
author:
- first_name: Ruixin
  full_name: Zuo, Ruixin
  last_name: Zuo
- first_name: Alexander
  full_name: Trautmann, Alexander
  id: '38163'
  last_name: Trautmann
- first_name: Guifang
  full_name: Wang, Guifang
  last_name: Wang
- first_name: Wolf-Rüdiger
  full_name: Hannes, Wolf-Rüdiger
  last_name: Hannes
- first_name: Shidong
  full_name: Yang, Shidong
  last_name: Yang
- first_name: Xiaohong
  full_name: Song, Xiaohong
  last_name: Song
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
- first_name: Marcelo
  full_name: Ciappina, Marcelo
  last_name: Ciappina
- first_name: Huynh Thanh
  full_name: Duc, Huynh Thanh
  last_name: Duc
- first_name: Weifeng
  full_name: Yang, Weifeng
  last_name: Yang
citation:
  ama: Zuo R, Trautmann A, Wang G, et al. Neighboring Atom Collisions in Solid-State
    High Harmonic Generation. <i>Ultrafast Science</i>. 2021;2021. doi:<a href="https://doi.org/10.34133/2021/9861923">10.34133/2021/9861923</a>
  apa: Zuo, R., Trautmann, A., Wang, G., Hannes, W.-R., Yang, S., Song, X., Meier,
    T., Ciappina, M., Duc, H. T., &#38; Yang, W. (2021). Neighboring Atom Collisions
    in Solid-State High Harmonic Generation. <i>Ultrafast Science</i>, <i>2021</i>.
    <a href="https://doi.org/10.34133/2021/9861923">https://doi.org/10.34133/2021/9861923</a>
  bibtex: '@article{Zuo_Trautmann_Wang_Hannes_Yang_Song_Meier_Ciappina_Duc_Yang_2021,
    title={Neighboring Atom Collisions in Solid-State High Harmonic Generation}, volume={2021},
    DOI={<a href="https://doi.org/10.34133/2021/9861923">10.34133/2021/9861923</a>},
    journal={Ultrafast Science}, publisher={American Association for the Advancement
    of Science (AAAS)}, author={Zuo, Ruixin and Trautmann, Alexander and Wang, Guifang
    and Hannes, Wolf-Rüdiger and Yang, Shidong and Song, Xiaohong and Meier, Torsten
    and Ciappina, Marcelo and Duc, Huynh Thanh and Yang, Weifeng}, year={2021} }'
  chicago: Zuo, Ruixin, Alexander Trautmann, Guifang Wang, Wolf-Rüdiger Hannes, Shidong
    Yang, Xiaohong Song, Torsten Meier, Marcelo Ciappina, Huynh Thanh Duc, and Weifeng
    Yang. “Neighboring Atom Collisions in Solid-State High Harmonic Generation.” <i>Ultrafast
    Science</i> 2021 (2021). <a href="https://doi.org/10.34133/2021/9861923">https://doi.org/10.34133/2021/9861923</a>.
  ieee: 'R. Zuo <i>et al.</i>, “Neighboring Atom Collisions in Solid-State High Harmonic
    Generation,” <i>Ultrafast Science</i>, vol. 2021, 2021, doi: <a href="https://doi.org/10.34133/2021/9861923">10.34133/2021/9861923</a>.'
  mla: Zuo, Ruixin, et al. “Neighboring Atom Collisions in Solid-State High Harmonic
    Generation.” <i>Ultrafast Science</i>, vol. 2021, American Association for the
    Advancement of Science (AAAS), 2021, doi:<a href="https://doi.org/10.34133/2021/9861923">10.34133/2021/9861923</a>.
  short: R. Zuo, A. Trautmann, G. Wang, W.-R. Hannes, S. Yang, X. Song, T. Meier,
    M. Ciappina, H.T. Duc, W. Yang, Ultrafast Science 2021 (2021).
date_created: 2023-01-18T11:25:42Z
date_updated: 2023-04-21T11:11:08Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
doi: 10.34133/2021/9861923
intvolume: '      2021'
language:
- iso: eng
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '53'
  name: 'TRR 142: TRR 142'
- _id: '54'
  name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '64'
  name: 'TRR 142 - A7: TRR 142 - Subproject A7'
publication: Ultrafast Science
publication_identifier:
  issn:
  - 2765-8791
publication_status: published
publisher: American Association for the Advancement of Science (AAAS)
status: public
title: Neighboring Atom Collisions in Solid-State High Harmonic Generation
type: journal_article
user_id: '16199'
volume: 2021
year: '2021'
...
---
_id: '37338'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>Methylammonium lead iodide perovskite
    (MAPbI<jats:sub>3</jats:sub>) is renowned for an impressive power conversion efficiency
    rise and cost-effective fabrication for photovoltaics. In this work, we demonstrate
    that polycrystalline MAPbI<jats:sub>3</jats:sub>s undergo drastic changes in optical
    properties at moderate field strengths with an ultrafast response time, via transient
    Wannier Stark localization. The distinct band structure of this material - the
    large lattice periodicity, the narrow electronic energy bandwidths, and the coincidence
    of these two along the same high-symmetry direction – enables relatively weak
    fields to bring this material into the Wannier Stark regime. Its polycrystalline
    nature is not detrimental to the optical switching performance of the material,
    since the least dispersive direction of the band structure dominates the contribution
    to the optical response, which favors low-cost fabrication. Together with the
    outstanding photophysical properties of MAPbI<jats:sub>3</jats:sub>, this finding
    highlights the great potential of this material in ultrafast light modulation
    and novel photonic applications.</jats:p>
article_number: '5719'
author:
- first_name: Daniel
  full_name: Berghoff, Daniel
  id: '38175'
  last_name: Berghoff
- first_name: Johannes
  full_name: Bühler, Johannes
  last_name: Bühler
- first_name: Mischa
  full_name: Bonn, Mischa
  last_name: Bonn
- first_name: Alfred
  full_name: Leitenstorfer, Alfred
  last_name: Leitenstorfer
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
- first_name: Heejae
  full_name: Kim, Heejae
  last_name: Kim
citation:
  ama: Berghoff D, Bühler J, Bonn M, Leitenstorfer A, Meier T, Kim H. Low-field onset
    of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite.
    <i>Nature Communications</i>. 2021;12(1). doi:<a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>
  apa: Berghoff, D., Bühler, J., Bonn, M., Leitenstorfer, A., Meier, T., &#38; Kim,
    H. (2021). Low-field onset of Wannier-Stark localization in a polycrystalline
    hybrid organic inorganic perovskite. <i>Nature Communications</i>, <i>12</i>(1),
    Article 5719. <a href="https://doi.org/10.1038/s41467-021-26021-4">https://doi.org/10.1038/s41467-021-26021-4</a>
  bibtex: '@article{Berghoff_Bühler_Bonn_Leitenstorfer_Meier_Kim_2021, title={Low-field
    onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic
    perovskite}, volume={12}, DOI={<a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>},
    number={15719}, journal={Nature Communications}, publisher={Springer Science and
    Business Media LLC}, author={Berghoff, Daniel and Bühler, Johannes and Bonn, Mischa
    and Leitenstorfer, Alfred and Meier, Torsten and Kim, Heejae}, year={2021} }'
  chicago: Berghoff, Daniel, Johannes Bühler, Mischa Bonn, Alfred Leitenstorfer, Torsten
    Meier, and Heejae Kim. “Low-Field Onset of Wannier-Stark Localization in a Polycrystalline
    Hybrid Organic Inorganic Perovskite.” <i>Nature Communications</i> 12, no. 1 (2021).
    <a href="https://doi.org/10.1038/s41467-021-26021-4">https://doi.org/10.1038/s41467-021-26021-4</a>.
  ieee: 'D. Berghoff, J. Bühler, M. Bonn, A. Leitenstorfer, T. Meier, and H. Kim,
    “Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic
    inorganic perovskite,” <i>Nature Communications</i>, vol. 12, no. 1, Art. no.
    5719, 2021, doi: <a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>.'
  mla: Berghoff, Daniel, et al. “Low-Field Onset of Wannier-Stark Localization in
    a Polycrystalline Hybrid Organic Inorganic Perovskite.” <i>Nature Communications</i>,
    vol. 12, no. 1, 5719, Springer Science and Business Media LLC, 2021, doi:<a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>.
  short: D. Berghoff, J. Bühler, M. Bonn, A. Leitenstorfer, T. Meier, H. Kim, Nature
    Communications 12 (2021).
date_created: 2023-01-18T11:47:55Z
date_updated: 2023-04-21T11:14:19Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
doi: 10.1038/s41467-021-26021-4
intvolume: '        12'
issue: '1'
keyword:
- General Physics and Astronomy
- General Biochemistry
- Genetics and Molecular Biology
- General Chemistry
- Multidisciplinary
language:
- iso: eng
project:
- _id: '53'
  name: 'TRR 142: TRR 142'
- _id: '54'
  name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '59'
  name: 'TRR 142 - A2: TRR 142 - Subproject A2'
publication: Nature Communications
publication_identifier:
  issn:
  - 2041-1723
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic
  inorganic perovskite
type: journal_article
user_id: '16199'
volume: 12
year: '2021'
...
---
_id: '23477'
author:
- first_name: Le Huu
  full_name: Thong, Le Huu
  last_name: Thong
- first_name: Cong
  full_name: Ngo, Cong
  last_name: Ngo
- first_name: Huynh Thanh
  full_name: Duc, Huynh Thanh
  last_name: Duc
- first_name: Xiaohong
  full_name: Song, Xiaohong
  last_name: Song
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
citation:
  ama: Thong LH, Ngo C, Duc HT, Song X, Meier T. Microscopic analysis of high harmonic
    generation in semiconductors with degenerate bands. <i>Physical Review B</i>.
    2021;103:085201. doi:<a href="https://doi.org/10.1103/physrevb.103.085201">10.1103/physrevb.103.085201</a>
  apa: Thong, L. H., Ngo, C., Duc, H. T., Song, X., &#38; Meier, T. (2021). Microscopic
    analysis of high harmonic generation in semiconductors with degenerate bands.
    <i>Physical Review B</i>, <i>103</i>, 085201. <a href="https://doi.org/10.1103/physrevb.103.085201">https://doi.org/10.1103/physrevb.103.085201</a>
  bibtex: '@article{Thong_Ngo_Duc_Song_Meier_2021, title={Microscopic analysis of
    high harmonic generation in semiconductors with degenerate bands}, volume={103},
    DOI={<a href="https://doi.org/10.1103/physrevb.103.085201">10.1103/physrevb.103.085201</a>},
    journal={Physical Review B}, author={Thong, Le Huu and Ngo, Cong and Duc, Huynh
    Thanh and Song, Xiaohong and Meier, Torsten}, year={2021}, pages={085201} }'
  chicago: 'Thong, Le Huu, Cong Ngo, Huynh Thanh Duc, Xiaohong Song, and Torsten Meier.
    “Microscopic Analysis of High Harmonic Generation in Semiconductors with Degenerate
    Bands.” <i>Physical Review B</i> 103 (2021): 085201. <a href="https://doi.org/10.1103/physrevb.103.085201">https://doi.org/10.1103/physrevb.103.085201</a>.'
  ieee: 'L. H. Thong, C. Ngo, H. T. Duc, X. Song, and T. Meier, “Microscopic analysis
    of high harmonic generation in semiconductors with degenerate bands,” <i>Physical
    Review B</i>, vol. 103, p. 085201, 2021, doi: <a href="https://doi.org/10.1103/physrevb.103.085201">10.1103/physrevb.103.085201</a>.'
  mla: Thong, Le Huu, et al. “Microscopic Analysis of High Harmonic Generation in
    Semiconductors with Degenerate Bands.” <i>Physical Review B</i>, vol. 103, 2021,
    p. 085201, doi:<a href="https://doi.org/10.1103/physrevb.103.085201">10.1103/physrevb.103.085201</a>.
  short: L.H. Thong, C. Ngo, H.T. Duc, X. Song, T. Meier, Physical Review B 103 (2021)
    085201.
date_created: 2021-08-24T08:50:33Z
date_updated: 2023-04-21T11:13:50Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
doi: 10.1103/physrevb.103.085201
intvolume: '       103'
language:
- iso: eng
page: '085201'
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physical Review B
publication_identifier:
  issn:
  - 2469-9950
  - 2469-9969
publication_status: published
status: public
title: Microscopic analysis of high harmonic generation in semiconductors with degenerate
  bands
type: journal_article
user_id: '16199'
volume: 103
year: '2021'
...
---
_id: '21946'
abstract:
- lang: eng
  text: Lithium niobate (LiNbO3), a material frequently used in optical applications,
    hosts different kinds of polarons that significantly affect many of its physical
    properties. In this study, a variety of electron polarons, namely free, bound,
    and bipolarons, are analyzed using first-principles calculations. We perform a
    full structural optimization based on density-functional theory for selected intrinsic
    defects with special attention to the role of symmetry-breaking distortions that
    lower the total energy. The cations hosting the various polarons relax to a different
    degree, with a larger relaxation corresponding to a larger gap between the defect
    level and the conduction-band edge. The projected density of states reveals that
    the polaron states are formerly empty Nb 4d states lowered into the band gap.
    Optical absorption spectra are derived within the independent-particle approximation,
    corrected by the GW approximation that yields a wider band gap and by including
    excitonic effects within the Bethe-Salpeter equation. Comparing the calculated
    spectra with the density of states, we find that the defect peak observed in the
    optical absorption stems from transitions between the defect level and a continuum
    of empty Nb 4d states. Signatures of polarons are further analyzed in the reflectivity
    and other experimentally measurable optical coefficients.
article_type: original
author:
- first_name: Falko
  full_name: Schmidt, Falko
  id: '35251'
  last_name: Schmidt
  orcid: 0000-0002-5071-5528
- first_name: Agnieszka L.
  full_name: Kozub, Agnieszka L.
  id: '77566'
  last_name: Kozub
  orcid: https://orcid.org/0000-0001-6584-0201
- first_name: Uwe
  full_name: Gerstmann, Uwe
  id: '171'
  last_name: Gerstmann
  orcid: 0000-0002-4476-223X
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Arno
  full_name: Schindlmayr, Arno
  id: '458'
  last_name: Schindlmayr
  orcid: 0000-0002-4855-071X
citation:
  ama: 'Schmidt F, Kozub AL, Gerstmann U, Schmidt WG, Schindlmayr A. Electron polarons
    in lithium niobate: Charge localization, lattice deformation, and optical response.
    <i>Crystals</i>. 2021;11:542. doi:<a href="https://doi.org/10.3390/cryst11050542">10.3390/cryst11050542</a>'
  apa: 'Schmidt, F., Kozub, A. L., Gerstmann, U., Schmidt, W. G., &#38; Schindlmayr,
    A. (2021). Electron polarons in lithium niobate: Charge localization, lattice
    deformation, and optical response. <i>Crystals</i>, <i>11</i>, 542. <a href="https://doi.org/10.3390/cryst11050542">https://doi.org/10.3390/cryst11050542</a>'
  bibtex: '@article{Schmidt_Kozub_Gerstmann_Schmidt_Schindlmayr_2021, title={Electron
    polarons in lithium niobate: Charge localization, lattice deformation, and optical
    response}, volume={11}, DOI={<a href="https://doi.org/10.3390/cryst11050542">10.3390/cryst11050542</a>},
    journal={Crystals}, publisher={MDPI}, author={Schmidt, Falko and Kozub, Agnieszka
    L. and Gerstmann, Uwe and Schmidt, Wolf Gero and Schindlmayr, Arno}, year={2021},
    pages={542} }'
  chicago: 'Schmidt, Falko, Agnieszka L. Kozub, Uwe Gerstmann, Wolf Gero Schmidt,
    and Arno Schindlmayr. “Electron Polarons in Lithium Niobate: Charge Localization,
    Lattice Deformation, and Optical Response.” <i>Crystals</i> 11 (2021): 542. <a
    href="https://doi.org/10.3390/cryst11050542">https://doi.org/10.3390/cryst11050542</a>.'
  ieee: 'F. Schmidt, A. L. Kozub, U. Gerstmann, W. G. Schmidt, and A. Schindlmayr,
    “Electron polarons in lithium niobate: Charge localization, lattice deformation,
    and optical response,” <i>Crystals</i>, vol. 11, p. 542, 2021, doi: <a href="https://doi.org/10.3390/cryst11050542">10.3390/cryst11050542</a>.'
  mla: 'Schmidt, Falko, et al. “Electron Polarons in Lithium Niobate: Charge Localization,
    Lattice Deformation, and Optical Response.” <i>Crystals</i>, vol. 11, MDPI, 2021,
    p. 542, doi:<a href="https://doi.org/10.3390/cryst11050542">10.3390/cryst11050542</a>.'
  short: F. Schmidt, A.L. Kozub, U. Gerstmann, W.G. Schmidt, A. Schindlmayr, Crystals
    11 (2021) 542.
date_created: 2021-05-03T09:36:13Z
date_updated: 2023-04-21T11:20:15Z
ddc:
- '530'
department:
- _id: '296'
- _id: '230'
- _id: '429'
- _id: '295'
- _id: '15'
- _id: '170'
- _id: '35'
- _id: '790'
doi: 10.3390/cryst11050542
external_id:
  isi:
  - '000653822700001'
file:
- access_level: open_access
  content_type: application/pdf
  creator: schindlm
  date_created: 2021-05-13T16:47:11Z
  date_updated: 2021-05-13T16:51:41Z
  description: Creative Commons Attribution 4.0 International Public License (CC BY
    4.0)
  file_id: '22163'
  file_name: crystals-11-00542.pdf
  file_size: 3042827
  relation: main_file
  title: 'Electron polarons in lithium niobate: Charge localization, lattice deformation,
    and optical response'
file_date_updated: 2021-05-13T16:51:41Z
funded_apc: '1'
has_accepted_license: '1'
intvolume: '        11'
isi: '1'
language:
- iso: eng
oa: '1'
page: '542'
project:
- _id: '53'
  name: TRR 142
- _id: '55'
  name: TRR 142 - Project Area B
- _id: '69'
  name: TRR 142 - Subproject B4
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Crystals
publication_identifier:
  eissn:
  - 2073-4352
publication_status: published
publisher: MDPI
quality_controlled: '1'
status: public
title: 'Electron polarons in lithium niobate: Charge localization, lattice deformation,
  and optical response'
type: journal_article
user_id: '171'
volume: 11
year: '2021'
...
---
_id: '43746'
abstract:
- lang: eng
  text: Population/mixing-time-dependent two-dimensional coherent spectra are presented
    for exciton-polaritons in a microcavity. Theory based on dynamically-controlled
    truncation reveals coherent and incoherent contributions to the decay dynamics.
article_number: FW5C. 6
author:
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
- first_name: Jagannath
  full_name: Paul, Jagannath
  last_name: Paul
- first_name: Hendrik
  full_name: Rose, Hendrik
  id: '55958'
  last_name: Rose
  orcid: 0000-0002-3079-5428
- first_name: Jared K
  full_name: Wahlstrand, Jared K
  last_name: Wahlstrand
- first_name: Alan D
  full_name: Bristow, Alan D
  last_name: Bristow
citation:
  ama: 'Meier T, Paul J, Rose H, Wahlstrand JK, Bristow AD. Coherent and incoherent
    contribution of population dynamics of semiconductor exciton-polaritons. In: <i>Frontiers
    in Optics</i>. Frontiers in Optics; 2021. doi:<a href="https://doi.org/10.1364/FIO.2021.FW5C.6">10.1364/FIO.2021.FW5C.6</a>'
  apa: Meier, T., Paul, J., Rose, H., Wahlstrand, J. K., &#38; Bristow, A. D. (2021).
    Coherent and incoherent contribution of population dynamics of semiconductor exciton-polaritons.
    <i>Frontiers in Optics</i>, Article FW5C. 6. Frontiers in Optics 2021, Washington,
    DC United States. <a href="https://doi.org/10.1364/FIO.2021.FW5C.6">https://doi.org/10.1364/FIO.2021.FW5C.6</a>
  bibtex: '@inproceedings{Meier_Paul_Rose_Wahlstrand_Bristow_2021, title={Coherent
    and incoherent contribution of population dynamics of semiconductor exciton-polaritons},
    DOI={<a href="https://doi.org/10.1364/FIO.2021.FW5C.6">10.1364/FIO.2021.FW5C.6</a>},
    number={FW5C. 6}, booktitle={Frontiers in Optics}, publisher={Frontiers in Optics},
    author={Meier, Torsten and Paul, Jagannath and Rose, Hendrik and Wahlstrand, Jared
    K and Bristow, Alan D}, year={2021} }'
  chicago: Meier, Torsten, Jagannath Paul, Hendrik Rose, Jared K Wahlstrand, and Alan
    D Bristow. “Coherent and Incoherent Contribution of Population Dynamics of Semiconductor
    Exciton-Polaritons.” In <i>Frontiers in Optics</i>. Frontiers in Optics, 2021.
    <a href="https://doi.org/10.1364/FIO.2021.FW5C.6">https://doi.org/10.1364/FIO.2021.FW5C.6</a>.
  ieee: 'T. Meier, J. Paul, H. Rose, J. K. Wahlstrand, and A. D. Bristow, “Coherent
    and incoherent contribution of population dynamics of semiconductor exciton-polaritons,”
    presented at the Frontiers in Optics 2021, Washington, DC United States, 2021,
    doi: <a href="https://doi.org/10.1364/FIO.2021.FW5C.6">10.1364/FIO.2021.FW5C.6</a>.'
  mla: Meier, Torsten, et al. “Coherent and Incoherent Contribution of Population
    Dynamics of Semiconductor Exciton-Polaritons.” <i>Frontiers in Optics</i>, FW5C.
    6, Frontiers in Optics, 2021, doi:<a href="https://doi.org/10.1364/FIO.2021.FW5C.6">10.1364/FIO.2021.FW5C.6</a>.
  short: 'T. Meier, J. Paul, H. Rose, J.K. Wahlstrand, A.D. Bristow, in: Frontiers
    in Optics, Frontiers in Optics, 2021.'
conference:
  end_date: 2021-11-04
  location: Washington, DC United States
  name: Frontiers in Optics 2021
  start_date: 2021-11-01
date_created: 2023-04-16T01:39:04Z
date_updated: 2023-04-21T11:18:00Z
department:
- _id: '293'
- _id: '35'
- _id: '15'
- _id: '170'
- _id: '230'
doi: 10.1364/FIO.2021.FW5C.6
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?uri=FiO-2021-FW5C.6
publication: Frontiers in Optics
publication_identifier:
  isbn:
  - 978-1-55752-308-2
publication_status: published
publisher: Frontiers in Optics
status: public
title: Coherent and incoherent contribution of population dynamics of semiconductor
  exciton-polaritons
type: conference
user_id: '16199'
year: '2021'
...
---
_id: '23474'
article_number: 116840X
author:
- first_name: Matthias
  full_name: Reichelt, Matthias
  id: '138'
  last_name: Reichelt
- first_name: Hendrik
  full_name: Rose, Hendrik
  id: '55958'
  last_name: Rose
  orcid: 0000-0002-3079-5428
- first_name: Alexander N.
  full_name: Kosarev, Alexander N.
  last_name: Kosarev
- first_name: Sergey V.
  full_name: Poltavtsev, Sergey V.
  last_name: Poltavtsev
- first_name: Manfred
  full_name: Bayer, Manfred
  last_name: Bayer
- first_name: Ilya A.
  full_name: Akimov, Ilya A.
  last_name: Akimov
- first_name: Christian
  full_name: Schneider, Christian
  last_name: Schneider
- first_name: Martin
  full_name: Kamp, Martin
  last_name: Kamp
- first_name: Sven
  full_name: Höfling, Sven
  last_name: Höfling
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
citation:
  ama: 'Reichelt M, Rose H, Kosarev AN, et al. Controlling the emission time of photon
    echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles.
    In: Betz M, Elezzabi AY, eds. <i>Ultrafast Phenomena and Nanophotonics XXV</i>.
    Vol 11684. SPIE Proceedings. ; 2021. doi:<a href="https://doi.org/10.1117/12.2576887">10.1117/12.2576887</a>'
  apa: Reichelt, M., Rose, H., Kosarev, A. N., Poltavtsev, S. V., Bayer, M., Akimov,
    I. A., Schneider, C., Kamp, M., Höfling, S., &#38; Meier, T. (2021). Controlling
    the emission time of photon echoes by optical freezing of exciton dephasing and
    rephasing in quantum-dot ensembles. In M. Betz &#38; A. Y. Elezzabi (Eds.), <i>Ultrafast
    Phenomena and Nanophotonics XXV</i> (No. 116840X; Vol. 11684). <a href="https://doi.org/10.1117/12.2576887">https://doi.org/10.1117/12.2576887</a>
  bibtex: '@inproceedings{Reichelt_Rose_Kosarev_Poltavtsev_Bayer_Akimov_Schneider_Kamp_Höfling_Meier_2021,
    series={SPIE Proceedings}, title={Controlling the emission time of photon echoes
    by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles},
    volume={11684}, DOI={<a href="https://doi.org/10.1117/12.2576887">10.1117/12.2576887</a>},
    number={116840X}, booktitle={Ultrafast Phenomena and Nanophotonics XXV}, author={Reichelt,
    Matthias and Rose, Hendrik and Kosarev, Alexander N. and Poltavtsev, Sergey V.
    and Bayer, Manfred and Akimov, Ilya A. and Schneider, Christian and Kamp, Martin
    and Höfling, Sven and Meier, Torsten}, editor={Betz, Markus and Elezzabi, Abdulhakem
    Y.}, year={2021}, collection={SPIE Proceedings} }'
  chicago: Reichelt, Matthias, Hendrik Rose, Alexander N. Kosarev, Sergey V. Poltavtsev,
    Manfred Bayer, Ilya A. Akimov, Christian Schneider, Martin Kamp, Sven Höfling,
    and Torsten Meier. “Controlling the Emission Time of Photon Echoes by Optical
    Freezing of Exciton Dephasing and Rephasing in Quantum-Dot Ensembles.” In <i>Ultrafast
    Phenomena and Nanophotonics XXV</i>, edited by Markus Betz and Abdulhakem Y. Elezzabi,
    Vol. 11684. SPIE Proceedings, 2021. <a href="https://doi.org/10.1117/12.2576887">https://doi.org/10.1117/12.2576887</a>.
  ieee: 'M. Reichelt <i>et al.</i>, “Controlling the emission time of photon echoes
    by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles,”
    in <i>Ultrafast Phenomena and Nanophotonics XXV</i>, 2021, vol. 11684, doi: <a
    href="https://doi.org/10.1117/12.2576887">10.1117/12.2576887</a>.'
  mla: Reichelt, Matthias, et al. “Controlling the Emission Time of Photon Echoes
    by Optical Freezing of Exciton Dephasing and Rephasing in Quantum-Dot Ensembles.”
    <i>Ultrafast Phenomena and Nanophotonics XXV</i>, edited by Markus Betz and Abdulhakem
    Y. Elezzabi, vol. 11684, 116840X, 2021, doi:<a href="https://doi.org/10.1117/12.2576887">10.1117/12.2576887</a>.
  short: 'M. Reichelt, H. Rose, A.N. Kosarev, S.V. Poltavtsev, M. Bayer, I.A. Akimov,
    C. Schneider, M. Kamp, S. Höfling, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.),
    Ultrafast Phenomena and Nanophotonics XXV, 2021.'
date_created: 2021-08-24T08:46:40Z
date_updated: 2023-04-21T11:20:10Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '623'
- _id: '35'
doi: 10.1117/12.2576887
editor:
- first_name: Markus
  full_name: Betz, Markus
  last_name: Betz
- first_name: Abdulhakem Y.
  full_name: Elezzabi, Abdulhakem Y.
  last_name: Elezzabi
intvolume: '     11684'
language:
- iso: eng
project:
- _id: '53'
  name: TRR 142
- _id: '54'
  name: TRR 142 - Project Area A
- _id: '59'
  name: TRR 142 - Subproject A2
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Ultrafast Phenomena and Nanophotonics XXV
publication_status: published
series_title: SPIE Proceedings
status: public
title: Controlling the emission time of photon echoes by optical freezing of exciton
  dephasing and rephasing in quantum-dot ensembles
type: conference
user_id: '16199'
volume: 11684
year: '2021'
...
---
_id: '23478'
article_number: '013702'
author:
- first_name: Hendrik
  full_name: Rose, Hendrik
  id: '55958'
  last_name: Rose
  orcid: 0000-0002-3079-5428
- first_name: D. V.
  full_name: Popolitova, D. V.
  last_name: Popolitova
- first_name: O. V.
  full_name: Tikhonova, O. V.
  last_name: Tikhonova
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
- first_name: Polina
  full_name: Sharapova, Polina
  id: '60286'
  last_name: Sharapova
citation:
  ama: Rose H, Popolitova DV, Tikhonova OV, Meier T, Sharapova P. Dark-state and loss-induced
    phenomena in the quantum-optical regime of Λ-type three-level systems. <i>Physical
    Review A</i>. 2021;103. doi:<a href="https://doi.org/10.1103/physreva.103.013702">10.1103/physreva.103.013702</a>
  apa: Rose, H., Popolitova, D. V., Tikhonova, O. V., Meier, T., &#38; Sharapova,
    P. (2021). Dark-state and loss-induced phenomena in the quantum-optical regime
    of Λ-type three-level systems. <i>Physical Review A</i>, <i>103</i>, Article 013702.
    <a href="https://doi.org/10.1103/physreva.103.013702">https://doi.org/10.1103/physreva.103.013702</a>
  bibtex: '@article{Rose_Popolitova_Tikhonova_Meier_Sharapova_2021, title={Dark-state
    and loss-induced phenomena in the quantum-optical regime of Λ-type three-level
    systems}, volume={103}, DOI={<a href="https://doi.org/10.1103/physreva.103.013702">10.1103/physreva.103.013702</a>},
    number={013702}, journal={Physical Review A}, author={Rose, Hendrik and Popolitova,
    D. V. and Tikhonova, O. V. and Meier, Torsten and Sharapova, Polina}, year={2021}
    }'
  chicago: Rose, Hendrik, D. V. Popolitova, O. V. Tikhonova, Torsten Meier, and Polina
    Sharapova. “Dark-State and Loss-Induced Phenomena in the Quantum-Optical Regime
    of Λ-Type Three-Level Systems.” <i>Physical Review A</i> 103 (2021). <a href="https://doi.org/10.1103/physreva.103.013702">https://doi.org/10.1103/physreva.103.013702</a>.
  ieee: 'H. Rose, D. V. Popolitova, O. V. Tikhonova, T. Meier, and P. Sharapova, “Dark-state
    and loss-induced phenomena in the quantum-optical regime of Λ-type three-level
    systems,” <i>Physical Review A</i>, vol. 103, Art. no. 013702, 2021, doi: <a href="https://doi.org/10.1103/physreva.103.013702">10.1103/physreva.103.013702</a>.'
  mla: Rose, Hendrik, et al. “Dark-State and Loss-Induced Phenomena in the Quantum-Optical
    Regime of Λ-Type Three-Level Systems.” <i>Physical Review A</i>, vol. 103, 013702,
    2021, doi:<a href="https://doi.org/10.1103/physreva.103.013702">10.1103/physreva.103.013702</a>.
  short: H. Rose, D.V. Popolitova, O.V. Tikhonova, T. Meier, P. Sharapova, Physical
    Review A 103 (2021).
date_created: 2021-08-24T08:51:19Z
date_updated: 2023-04-21T11:20:34Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '623'
- _id: '35'
doi: 10.1103/physreva.103.013702
intvolume: '       103'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
  issn:
  - 2469-9926
  - 2469-9934
publication_status: published
status: public
title: Dark-state and loss-induced phenomena in the quantum-optical regime of Λ-type
  three-level systems
type: journal_article
user_id: '16199'
volume: 103
year: '2021'
...
---
_id: '23473'
article_number: '043045'
author:
- first_name: Didier Belobo
  full_name: Belobo, Didier Belobo
  last_name: Belobo
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
citation:
  ama: Belobo DB, Meier T. Approximate nonlinear wave solutions of the coupled two-component
    Gross–Pitaevskii equations with spin–orbit interaction. <i>New Journal of Physics</i>.
    2021;23. doi:<a href="https://doi.org/10.1088/1367-2630/abf3ed">10.1088/1367-2630/abf3ed</a>
  apa: Belobo, D. B., &#38; Meier, T. (2021). Approximate nonlinear wave solutions
    of the coupled two-component Gross–Pitaevskii equations with spin–orbit interaction.
    <i>New Journal of Physics</i>, <i>23</i>, Article 043045. <a href="https://doi.org/10.1088/1367-2630/abf3ed">https://doi.org/10.1088/1367-2630/abf3ed</a>
  bibtex: '@article{Belobo_Meier_2021, title={Approximate nonlinear wave solutions
    of the coupled two-component Gross–Pitaevskii equations with spin–orbit interaction},
    volume={23}, DOI={<a href="https://doi.org/10.1088/1367-2630/abf3ed">10.1088/1367-2630/abf3ed</a>},
    number={043045}, journal={New Journal of Physics}, author={Belobo, Didier Belobo
    and Meier, Torsten}, year={2021} }'
  chicago: Belobo, Didier Belobo, and Torsten Meier. “Approximate Nonlinear Wave Solutions
    of the Coupled Two-Component Gross–Pitaevskii Equations with Spin–Orbit Interaction.”
    <i>New Journal of Physics</i> 23 (2021). <a href="https://doi.org/10.1088/1367-2630/abf3ed">https://doi.org/10.1088/1367-2630/abf3ed</a>.
  ieee: 'D. B. Belobo and T. Meier, “Approximate nonlinear wave solutions of the coupled
    two-component Gross–Pitaevskii equations with spin–orbit interaction,” <i>New
    Journal of Physics</i>, vol. 23, Art. no. 043045, 2021, doi: <a href="https://doi.org/10.1088/1367-2630/abf3ed">10.1088/1367-2630/abf3ed</a>.'
  mla: Belobo, Didier Belobo, and Torsten Meier. “Approximate Nonlinear Wave Solutions
    of the Coupled Two-Component Gross–Pitaevskii Equations with Spin–Orbit Interaction.”
    <i>New Journal of Physics</i>, vol. 23, 043045, 2021, doi:<a href="https://doi.org/10.1088/1367-2630/abf3ed">10.1088/1367-2630/abf3ed</a>.
  short: D.B. Belobo, T. Meier, New Journal of Physics 23 (2021).
date_created: 2021-08-24T08:43:07Z
date_updated: 2023-04-21T11:20:56Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
doi: 10.1088/1367-2630/abf3ed
intvolume: '        23'
language:
- iso: eng
publication: New Journal of Physics
publication_identifier:
  issn:
  - 1367-2630
publication_status: published
status: public
title: Approximate nonlinear wave solutions of the coupled two-component Gross–Pitaevskii
  equations with spin–orbit interaction
type: journal_article
user_id: '16199'
volume: 23
year: '2021'
...
---
_id: '22881'
author:
- first_name: T. T. Nhung
  full_name: Nguyen, T. T. Nhung
  last_name: Nguyen
- first_name: T.
  full_name: Sollfrank, T.
  last_name: Sollfrank
- first_name: C.
  full_name: Tegenkamp, C.
  last_name: Tegenkamp
- first_name: E.
  full_name: Rauls, E.
  last_name: Rauls
- first_name: Uwe
  full_name: Gerstmann, Uwe
  id: '171'
  last_name: Gerstmann
  orcid: 0000-0002-4476-223X
citation:
  ama: Nguyen TTN, Sollfrank T, Tegenkamp C, Rauls E, Gerstmann U. Impact of screening
    and relaxation on weakly coupled two-dimensional heterostructures. <i>Physical
    Review B</i>. 2021;103:L201408. doi:<a href="https://doi.org/10.1103/physrevb.103.l201408">10.1103/physrevb.103.l201408</a>
  apa: Nguyen, T. T. N., Sollfrank, T., Tegenkamp, C., Rauls, E., &#38; Gerstmann,
    U. (2021). Impact of screening and relaxation on weakly coupled two-dimensional
    heterostructures. <i>Physical Review B</i>, <i>103</i>, L201408. <a href="https://doi.org/10.1103/physrevb.103.l201408">https://doi.org/10.1103/physrevb.103.l201408</a>
  bibtex: '@article{Nguyen_Sollfrank_Tegenkamp_Rauls_Gerstmann_2021, title={Impact
    of screening and relaxation on weakly coupled two-dimensional heterostructures},
    volume={103}, DOI={<a href="https://doi.org/10.1103/physrevb.103.l201408">10.1103/physrevb.103.l201408</a>},
    journal={Physical Review B}, author={Nguyen, T. T. Nhung and Sollfrank, T. and
    Tegenkamp, C. and Rauls, E. and Gerstmann, Uwe}, year={2021}, pages={L201408}
    }'
  chicago: 'Nguyen, T. T. Nhung, T. Sollfrank, C. Tegenkamp, E. Rauls, and Uwe Gerstmann.
    “Impact of Screening and Relaxation on Weakly Coupled Two-Dimensional Heterostructures.”
    <i>Physical Review B</i> 103 (2021): L201408. <a href="https://doi.org/10.1103/physrevb.103.l201408">https://doi.org/10.1103/physrevb.103.l201408</a>.'
  ieee: 'T. T. N. Nguyen, T. Sollfrank, C. Tegenkamp, E. Rauls, and U. Gerstmann,
    “Impact of screening and relaxation on weakly coupled two-dimensional heterostructures,”
    <i>Physical Review B</i>, vol. 103, p. L201408, 2021, doi: <a href="https://doi.org/10.1103/physrevb.103.l201408">10.1103/physrevb.103.l201408</a>.'
  mla: Nguyen, T. T. Nhung, et al. “Impact of Screening and Relaxation on Weakly Coupled
    Two-Dimensional Heterostructures.” <i>Physical Review B</i>, vol. 103, 2021, p.
    L201408, doi:<a href="https://doi.org/10.1103/physrevb.103.l201408">10.1103/physrevb.103.l201408</a>.
  short: T.T.N. Nguyen, T. Sollfrank, C. Tegenkamp, E. Rauls, U. Gerstmann, Physical
    Review B 103 (2021) L201408.
date_created: 2021-07-29T07:09:50Z
date_updated: 2023-04-21T11:24:45Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '35'
- _id: '790'
doi: 10.1103/physrevb.103.l201408
intvolume: '       103'
language:
- iso: eng
page: L201408
project:
- _id: '53'
  name: TRR 142
- _id: '55'
  name: TRR 142 - Project Area B
- _id: '69'
  name: TRR 142 - Subproject B4
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physical Review B
publication_identifier:
  issn:
  - 2469-9950
  - 2469-9969
publication_status: published
status: public
title: Impact of screening and relaxation on weakly coupled two-dimensional heterostructures
type: journal_article
user_id: '171'
volume: 103
year: '2021'
...
---
_id: '21635'
abstract:
- lang: eng
  text: <jats:p>Modern forming processes often allow today the efficient production
    of complex parts. In order to increase the sustainability of forming processes
    it would be favorable if the forming of workpieces becomes possible using production
    waste. At the Chair of Forming and Machining Technology of the Paderborn University
    (LUF) research is presently conducted with the overall goal to produce workpieces
    directly from secondary aluminum (e.g., powder and chips). Therefore, friction-based
    forming processes like friction spinning (or cognate processes) are used due to
    their high efficiency. As a pre-step, the production of semi-finished parts was
    the subject of accorded research work at the LUF. Therefore, a friction-based
    hot extrusion process was used for the full recycling or rework of aluminum chips
    into profiles. Investigations of the recycled semi-finished products show that
    they are comparable to conventionally produced semi-finished products in terms
    of dimensional stability and shape accuracy. An analysis of the mechanical properties
    of hardness and tensile strength shows that a final product with good and homogeneously
    distributed properties can be produced. Furthermore, significant correlations
    to the friction spinning process could be found that are useful for the above-mentioned
    direct part production from secondary aluminum.</jats:p>
article_number: '663'
author:
- first_name: Thomas
  full_name: Borgert, Thomas
  id: '83141'
  last_name: Borgert
- first_name: Werner
  full_name: Homberg, Werner
  last_name: Homberg
citation:
  ama: Borgert T, Homberg W. Friction-Induced Recycling Process for User-Specific
    Semi-Finished Product Production. <i>Metals</i>. Published online 2021. doi:<a
    href="https://doi.org/10.3390/met11040663">10.3390/met11040663</a>
  apa: Borgert, T., &#38; Homberg, W. (2021). Friction-Induced Recycling Process for
    User-Specific Semi-Finished Product Production. <i>Metals</i>, Article 663. <a
    href="https://doi.org/10.3390/met11040663">https://doi.org/10.3390/met11040663</a>
  bibtex: '@article{Borgert_Homberg_2021, title={Friction-Induced Recycling Process
    for User-Specific Semi-Finished Product Production}, DOI={<a href="https://doi.org/10.3390/met11040663">10.3390/met11040663</a>},
    number={663}, journal={Metals}, author={Borgert, Thomas and Homberg, Werner},
    year={2021} }'
  chicago: Borgert, Thomas, and Werner Homberg. “Friction-Induced Recycling Process
    for User-Specific Semi-Finished Product Production.” <i>Metals</i>, 2021. <a href="https://doi.org/10.3390/met11040663">https://doi.org/10.3390/met11040663</a>.
  ieee: 'T. Borgert and W. Homberg, “Friction-Induced Recycling Process for User-Specific
    Semi-Finished Product Production,” <i>Metals</i>, Art. no. 663, 2021, doi: <a
    href="https://doi.org/10.3390/met11040663">10.3390/met11040663</a>.'
  mla: Borgert, Thomas, and Werner Homberg. “Friction-Induced Recycling Process for
    User-Specific Semi-Finished Product Production.” <i>Metals</i>, 663, 2021, doi:<a
    href="https://doi.org/10.3390/met11040663">10.3390/met11040663</a>.
  short: T. Borgert, W. Homberg, Metals (2021).
date_created: 2021-04-20T05:02:14Z
date_updated: 2023-04-26T13:25:52Z
department:
- _id: '156'
doi: 10.3390/met11040663
language:
- iso: eng
publication: Metals
publication_identifier:
  issn:
  - 2075-4701
publication_status: published
quality_controlled: '1'
status: public
title: Friction-Induced Recycling Process for User-Specific Semi-Finished Product
  Production
type: journal_article
user_id: '83141'
year: '2021'
...
---
_id: '23746'
author:
- first_name: Elmar
  full_name: Moritzer, Elmar
  id: '20531'
  last_name: Moritzer
- first_name: Felix
  full_name: Flachmann, Felix
  id: '38212'
  last_name: Flachmann
  orcid: 0000-0002-7651-7028
citation:
  ama: 'Moritzer E, Flachmann F. Influence of Chemical Blowing Agents on the Filling
    Behavior of Wood-Plastic-Composite Melts. In: <i>SPE ANTEC 2021: The Annual Technical
    Conference for Plastic Professionals</i>. ; 2021:536-540.'
  apa: 'Moritzer, E., &#38; Flachmann, F. (2021). Influence of Chemical Blowing Agents
    on the Filling Behavior of Wood-Plastic-Composite Melts. <i>SPE ANTEC 2021: The
    Annual Technical Conference for Plastic Professionals</i>, 536–540.'
  bibtex: '@inproceedings{Moritzer_Flachmann_2021, title={Influence of Chemical Blowing
    Agents on the Filling Behavior of Wood-Plastic-Composite Melts}, booktitle={SPE
    ANTEC 2021: The Annual Technical Conference for Plastic Professionals}, author={Moritzer,
    Elmar and Flachmann, Felix}, year={2021}, pages={536–540} }'
  chicago: 'Moritzer, Elmar, and Felix Flachmann. “Influence of Chemical Blowing Agents
    on the Filling Behavior of Wood-Plastic-Composite Melts.” In <i>SPE ANTEC 2021:
    The Annual Technical Conference for Plastic Professionals</i>, 536–40, 2021.'
  ieee: 'E. Moritzer and F. Flachmann, “Influence of Chemical Blowing Agents on the
    Filling Behavior of Wood-Plastic-Composite Melts,” in <i>SPE ANTEC 2021: The Annual
    Technical Conference for Plastic Professionals</i>, Online, 2021, pp. 536–540.'
  mla: 'Moritzer, Elmar, and Felix Flachmann. “Influence of Chemical Blowing Agents
    on the Filling Behavior of Wood-Plastic-Composite Melts.” <i>SPE ANTEC 2021: The
    Annual Technical Conference for Plastic Professionals</i>, 2021, pp. 536–40.'
  short: 'E. Moritzer, F. Flachmann, in: SPE ANTEC 2021: The Annual Technical Conference
    for Plastic Professionals, 2021, pp. 536–540.'
conference:
  end_date: 2021-05-14
  location: Online
  name: 'SPE ANTEC 2021: The Annual  Technical Conference for Plastic  Professionals '
  start_date: 2021-05-10
date_created: 2021-09-03T11:23:28Z
date_updated: 2023-04-26T13:39:14Z
department:
- _id: '321'
- _id: '9'
- _id: '367'
language:
- iso: eng
page: 536-540
publication: 'SPE ANTEC 2021: The Annual Technical Conference for Plastic Professionals'
publication_identifier:
  isbn:
  - 978-1-7138-3075-7
quality_controlled: '1'
status: public
title: Influence of Chemical Blowing Agents on the Filling Behavior of Wood-Plastic-Composite
  Melts
type: conference
user_id: '38212'
year: '2021'
...
---
_id: '23789'
author:
- first_name: Lukas
  full_name: Bolenz, Lukas
  id: '65478'
  last_name: Bolenz
- first_name: Thomas
  full_name: Ehlert, Thomas
  id: '47151'
  last_name: Ehlert
- first_name: Christopher
  full_name: Dechert, Christopher
  id: '69828'
  last_name: Dechert
- first_name: René
  full_name: Bertling, René
  id: '30050'
  last_name: Bertling
- first_name: Eugeny
  full_name: Kenig, Eugeny
  id: '665'
  last_name: Kenig
citation:
  ama: Bolenz L, Ehlert T, Dechert C, Bertling R, Kenig E. Modelling of a continuous
    distillation process with finite reflux ratio using the hydrodynamic analogy approach.
    <i>Chemical Engineering Research and Design</i>. Published online 2021:99-108.
    doi:<a href="https://doi.org/10.1016/j.cherd.2021.05.025">10.1016/j.cherd.2021.05.025</a>
  apa: Bolenz, L., Ehlert, T., Dechert, C., Bertling, R., &#38; Kenig, E. (2021).
    Modelling of a continuous distillation process with finite reflux ratio using
    the hydrodynamic analogy approach. <i>Chemical Engineering Research and Design</i>,
    99–108. <a href="https://doi.org/10.1016/j.cherd.2021.05.025">https://doi.org/10.1016/j.cherd.2021.05.025</a>
  bibtex: '@article{Bolenz_Ehlert_Dechert_Bertling_Kenig_2021, title={Modelling of
    a continuous distillation process with finite reflux ratio using the hydrodynamic
    analogy approach}, DOI={<a href="https://doi.org/10.1016/j.cherd.2021.05.025">10.1016/j.cherd.2021.05.025</a>},
    journal={Chemical Engineering Research and Design}, author={Bolenz, Lukas and
    Ehlert, Thomas and Dechert, Christopher and Bertling, René and Kenig, Eugeny},
    year={2021}, pages={99–108} }'
  chicago: Bolenz, Lukas, Thomas Ehlert, Christopher Dechert, René Bertling, and Eugeny
    Kenig. “Modelling of a Continuous Distillation Process with Finite Reflux Ratio
    Using the Hydrodynamic Analogy Approach.” <i>Chemical Engineering Research and
    Design</i>, 2021, 99–108. <a href="https://doi.org/10.1016/j.cherd.2021.05.025">https://doi.org/10.1016/j.cherd.2021.05.025</a>.
  ieee: 'L. Bolenz, T. Ehlert, C. Dechert, R. Bertling, and E. Kenig, “Modelling of
    a continuous distillation process with finite reflux ratio using the hydrodynamic
    analogy approach,” <i>Chemical Engineering Research and Design</i>, pp. 99–108,
    2021, doi: <a href="https://doi.org/10.1016/j.cherd.2021.05.025">10.1016/j.cherd.2021.05.025</a>.'
  mla: Bolenz, Lukas, et al. “Modelling of a Continuous Distillation Process with
    Finite Reflux Ratio Using the Hydrodynamic Analogy Approach.” <i>Chemical Engineering
    Research and Design</i>, 2021, pp. 99–108, doi:<a href="https://doi.org/10.1016/j.cherd.2021.05.025">10.1016/j.cherd.2021.05.025</a>.
  short: L. Bolenz, T. Ehlert, C. Dechert, R. Bertling, E. Kenig, Chemical Engineering
    Research and Design (2021) 99–108.
date_created: 2021-09-06T10:30:44Z
date_updated: 2023-04-27T06:28:16Z
department:
- _id: '145'
- _id: '9'
doi: 10.1016/j.cherd.2021.05.025
language:
- iso: eng
page: 99-108
publication: Chemical Engineering Research and Design
publication_identifier:
  issn:
  - 0263-8762
publication_status: published
quality_controlled: '1'
status: public
title: Modelling of a continuous distillation process with finite reflux ratio using
  the hydrodynamic analogy approach
type: journal_article
user_id: '69828'
year: '2021'
...
---
_id: '34222'
abstract:
- lang: eng
  text: Driven by the CO2-emission law by the European government and the increasing
    costs for raw materials as well as energy, the automotive industry is increasingly
    using multi-material constructions. This leads to a continuous increase in the
    use of mechanical joining techniques and especially the self-piercing riveting
    is of particular importance. The reason for this is the wide range of joining
    possibilities as well as the high load-bearing capacities of the joints. To be
    able to react to changing boundary conditions, like material thickness or strength
    variation of the sheets, research work is crucial with regard to the increase
    of versatility. In this paper, a numerical study of the influences on the selfpiercing
    riveting process is presented. For this purpose, the influence of different process
    parameters such as rivet length and die depth on various quality-relevant characteristics
    were investigated. With the help of the design of experiment, significant influences
    were determined and interactions between the individual parameters are shown.
author:
- first_name: Fabian
  full_name: Kappe, Fabian
  id: '66459'
  last_name: Kappe
- first_name: Christian Roman
  full_name: Bielak, Christian Roman
  id: '34782'
  last_name: Bielak
- first_name: Vadim
  full_name: Sartisson, Vadim
  last_name: Sartisson
- first_name: Mathias
  full_name: Bobbert, Mathias
  id: '7850'
  last_name: Bobbert
- first_name: Gerson
  full_name: Meschut, Gerson
  id: '32056'
  last_name: Meschut
  orcid: 0000-0002-2763-1246
citation:
  ama: 'Kappe F, Bielak CR, Sartisson V, Bobbert M, Meschut G. Influence of rivet
    length on joint formation on self-piercing riveting process considering further
    process parameters. In: <i>ESAFORM 2021</i>. University of Liege; 2021. doi:<a
    href="https://doi.org/10.25518/esaform21.4277">10.25518/esaform21.4277</a>'
  apa: Kappe, F., Bielak, C. R., Sartisson, V., Bobbert, M., &#38; Meschut, G. (2021).
    Influence of rivet length on joint formation on self-piercing riveting process
    considering further process parameters. <i>ESAFORM 2021</i>. <a href="https://doi.org/10.25518/esaform21.4277">https://doi.org/10.25518/esaform21.4277</a>
  bibtex: '@inproceedings{Kappe_Bielak_Sartisson_Bobbert_Meschut_2021, title={Influence
    of rivet length on joint formation on self-piercing riveting process considering
    further process parameters}, DOI={<a href="https://doi.org/10.25518/esaform21.4277">10.25518/esaform21.4277</a>},
    booktitle={ESAFORM 2021}, publisher={University of Liege}, author={Kappe, Fabian
    and Bielak, Christian Roman and Sartisson, Vadim and Bobbert, Mathias and Meschut,
    Gerson}, year={2021} }'
  chicago: Kappe, Fabian, Christian Roman Bielak, Vadim Sartisson, Mathias Bobbert,
    and Gerson Meschut. “Influence of rivet length on joint formation on self-piercing
    riveting process considering further process parameters.” In <i>ESAFORM 2021</i>.
    University of Liege, 2021. <a href="https://doi.org/10.25518/esaform21.4277">https://doi.org/10.25518/esaform21.4277</a>.
  ieee: 'F. Kappe, C. R. Bielak, V. Sartisson, M. Bobbert, and G. Meschut, “Influence
    of rivet length on joint formation on self-piercing riveting process considering
    further process parameters,” 2021, doi: <a href="https://doi.org/10.25518/esaform21.4277">10.25518/esaform21.4277</a>.'
  mla: Kappe, Fabian, et al. “Influence of rivet length on joint formation on self-piercing
    riveting process considering further process parameters.” <i>ESAFORM 2021</i>,
    University of Liege, 2021, doi:<a href="https://doi.org/10.25518/esaform21.4277">10.25518/esaform21.4277</a>.
  short: 'F. Kappe, C.R. Bielak, V. Sartisson, M. Bobbert, G. Meschut, in: ESAFORM
    2021, University of Liege, 2021.'
date_created: 2022-12-05T21:45:13Z
date_updated: 2023-04-27T08:52:48Z
department:
- _id: '630'
- _id: '157'
doi: 10.25518/esaform21.4277
language:
- iso: fre
project:
- _id: '130'
  grant_number: '418701707'
  name: 'TRR 285: TRR 285'
- _id: '131'
  name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
  name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _id: '133'
  name: 'TRR 285 - C: TRR 285 - Project Area C'
- _id: '146'
  name: 'TRR 285 – C02: TRR 285 - Subproject C02'
publication: ESAFORM 2021
publication_status: published
publisher: University of Liege
quality_controlled: '1'
status: public
title: Influence of rivet length on joint formation on self-piercing riveting process
  considering further process parameters
type: conference
user_id: '66459'
year: '2021'
...
---
_id: '30675'
abstract:
- lang: eng
  text: <jats:p>In many areas of product manufacturing constructions consist of individual
    components and metal sheets that are joined together to form complex structures.
    A simple and industrial common method for joining dissimilar and coated materials
    is clinching. During the joining process and due to the service load cracks can
    occur in the area of the joint, propagate due to cyclic loading and consequently
    lead to structural failure. For the prevention of these damage cases, first of
    all knowledge about the fracture mechanical material parameters regarding the
    original material state of the sheet metals used within the clinching process
    are essential.Within the scope of this paper experimental and numerical preliminary
    investigations regarding the fracture mechanical behavior of sheet metals used
    within the clinching process are presented. Due to the low thickness of 1.5 mm
    of the material sheets, the development of a new specimen is necessary to determine
    the crack growth rate curve including the fracture mechanical parameters like
    the threshold against crack growth ΔK<jats:sub>I,th</jats:sub> and the fracture
    toughness K<jats:sub>IC</jats:sub> of the base material HCT590X. For the experimental
    determination of the crack growth rate curve the numerical calculation of the
    geometry factor function as well as the calibration function of this special specimen
    are essential. After the experimental validation of the numerically determined
    calibration function, crack growth rate curves are determined for the stress ratios
    <jats:italic>R</jats:italic> = 0.1 and <jats:italic>R</jats:italic> = 0.3 to examine
    the mean stress sensitivity. In addition, the different rolling directions of
    0° and 90° in relation to the initial crack are taken into account in order to
    investigate the influence of the anisotropy due to rolling.</jats:p>
author:
- first_name: Deborah
  full_name: Weiß, Deborah
  id: '45673'
  last_name: Weiß
- first_name: Britta
  full_name: Schramm, Britta
  id: '4668'
  last_name: Schramm
- first_name: Gunter
  full_name: Kullmer, Gunter
  id: '291'
  last_name: Kullmer
citation:
  ama: 'Weiß D, Schramm B, Kullmer G. Numerical and Experimental Fracture Mechanical
    Investigations of Clinchable Sheet Metals Made of HCT590X. In: <i>Key Engineering
    Materials</i>. Vol 883. Trans Tech Publications, Ltd.; 2021:127-132. doi:<a href="https://doi.org/10.4028/www.scientific.net/kem.883.127">10.4028/www.scientific.net/kem.883.127</a>'
  apa: Weiß, D., Schramm, B., &#38; Kullmer, G. (2021). Numerical and Experimental
    Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X.
    <i>Key Engineering Materials</i>, <i>883</i>, 127–132. <a href="https://doi.org/10.4028/www.scientific.net/kem.883.127">https://doi.org/10.4028/www.scientific.net/kem.883.127</a>
  bibtex: '@inproceedings{Weiß_Schramm_Kullmer_2021, title={Numerical and Experimental
    Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X},
    volume={883}, DOI={<a href="https://doi.org/10.4028/www.scientific.net/kem.883.127">10.4028/www.scientific.net/kem.883.127</a>},
    booktitle={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.},
    author={Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}, year={2021}, pages={127–132}
    }'
  chicago: Weiß, Deborah, Britta Schramm, and Gunter Kullmer. “Numerical and Experimental
    Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X.”
    In <i>Key Engineering Materials</i>, 883:127–32. Trans Tech Publications, Ltd.,
    2021. <a href="https://doi.org/10.4028/www.scientific.net/kem.883.127">https://doi.org/10.4028/www.scientific.net/kem.883.127</a>.
  ieee: 'D. Weiß, B. Schramm, and G. Kullmer, “Numerical and Experimental Fracture
    Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X,” in <i>Key
    Engineering Materials</i>, online, 2021, vol. 883, pp. 127–132, doi: <a href="https://doi.org/10.4028/www.scientific.net/kem.883.127">10.4028/www.scientific.net/kem.883.127</a>.'
  mla: Weiß, Deborah, et al. “Numerical and Experimental Fracture Mechanical Investigations
    of Clinchable Sheet Metals Made of HCT590X.” <i>Key Engineering Materials</i>,
    vol. 883, Trans Tech Publications, Ltd., 2021, pp. 127–32, doi:<a href="https://doi.org/10.4028/www.scientific.net/kem.883.127">10.4028/www.scientific.net/kem.883.127</a>.
  short: 'D. Weiß, B. Schramm, G. Kullmer, in: Key Engineering Materials, Trans Tech
    Publications, Ltd., 2021, pp. 127–132.'
conference:
  end_date: 2021-03-31
  location: online
  name: 19th International Conference on Sheet Metal
  start_date: 2021-03-29
date_created: 2022-03-29T08:09:01Z
date_updated: 2023-04-27T10:13:19Z
department:
- _id: '143'
doi: 10.4028/www.scientific.net/kem.883.127
intvolume: '       883'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
page: 127-132
publication: Key Engineering Materials
publication_identifier:
  issn:
  - 1662-9795
publication_status: published
publisher: Trans Tech Publications, Ltd.
quality_controlled: '1'
status: public
title: Numerical and Experimental Fracture Mechanical Investigations of Clinchable
  Sheet Metals Made of HCT590X
type: conference
user_id: '45673'
volume: 883
year: '2021'
...
---
_id: '30674'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>In addition to the classical strength
    calculation, it is important to design components with regard to fracture mechanics
    because defects and cracks in a component can drastically influence its strength
    or fatigue behavior. Cracks can propagate due to operational loads and consequently
    lead to component failure. The fracture mechanical analysis provides information
    on stable or unstable crack growth as well as about the direction and the growth
    rate of a crack. For this purpose, sufficient information has to be available
    about the crack location, the crack length, the component geometry, the component
    loading and the fracture mechanical material parameters. The fracture mechanical
    properties are determined experimentally with standardized specimens as defined
    by the guidelines of the American Society for Testing and Materials. In practice,
    however, especially in the context with damage cases or formed material fracture
    mechanical parameters directly for a component are of interest. However, standard
    specimens often cannot be extracted at all due to the complexity of the component
    geometry. Therefore, the development of special specimens is required whereby
    certain arrangements have to be made in advance. These arrangements are presented
    in the present paper in order to contribute to a holistic investigation chain
    for the experimental determination of fracture mechanical material parameters
    with special specimens.</jats:p>
author:
- first_name: Deborah
  full_name: Weiß, Deborah
  id: '45673'
  last_name: Weiß
- first_name: Britta
  full_name: Schramm, Britta
  id: '4668'
  last_name: Schramm
- first_name: Gunter
  full_name: Kullmer, Gunter
  id: '291'
  last_name: Kullmer
citation:
  ama: Weiß D, Schramm B, Kullmer G. Holistic investigation chain for the experimental
    determination of fracture mechanical material parameters with special specimens.
    <i>Production Engineering</i>. Published online 2021. doi:<a href="https://doi.org/10.1007/s11740-021-01096-6">10.1007/s11740-021-01096-6</a>
  apa: Weiß, D., Schramm, B., &#38; Kullmer, G. (2021). Holistic investigation chain
    for the experimental determination of fracture mechanical material parameters
    with special specimens. <i>Production Engineering</i>. <a href="https://doi.org/10.1007/s11740-021-01096-6">https://doi.org/10.1007/s11740-021-01096-6</a>
  bibtex: '@article{Weiß_Schramm_Kullmer_2021, title={Holistic investigation chain
    for the experimental determination of fracture mechanical material parameters
    with special specimens}, DOI={<a href="https://doi.org/10.1007/s11740-021-01096-6">10.1007/s11740-021-01096-6</a>},
    journal={Production Engineering}, publisher={Springer Science and Business Media
    LLC}, author={Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}, year={2021}
    }'
  chicago: Weiß, Deborah, Britta Schramm, and Gunter Kullmer. “Holistic Investigation
    Chain for the Experimental Determination of Fracture Mechanical Material Parameters
    with Special Specimens.” <i>Production Engineering</i>, 2021. <a href="https://doi.org/10.1007/s11740-021-01096-6">https://doi.org/10.1007/s11740-021-01096-6</a>.
  ieee: 'D. Weiß, B. Schramm, and G. Kullmer, “Holistic investigation chain for the
    experimental determination of fracture mechanical material parameters with special
    specimens,” <i>Production Engineering</i>, 2021, doi: <a href="https://doi.org/10.1007/s11740-021-01096-6">10.1007/s11740-021-01096-6</a>.'
  mla: Weiß, Deborah, et al. “Holistic Investigation Chain for the Experimental Determination
    of Fracture Mechanical Material Parameters with Special Specimens.” <i>Production
    Engineering</i>, Springer Science and Business Media LLC, 2021, doi:<a href="https://doi.org/10.1007/s11740-021-01096-6">10.1007/s11740-021-01096-6</a>.
  short: D. Weiß, B. Schramm, G. Kullmer, Production Engineering (2021).
date_created: 2022-03-29T08:05:02Z
date_updated: 2023-04-27T10:14:53Z
department:
- _id: '143'
doi: 10.1007/s11740-021-01096-6
keyword:
- Industrial and Manufacturing Engineering
- Mechanical Engineering
language:
- iso: eng
publication: Production Engineering
publication_identifier:
  issn:
  - 0944-6524
  - 1863-7353
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Holistic investigation chain for the experimental determination of fracture
  mechanical material parameters with special specimens
type: journal_article
user_id: '45673'
year: '2021'
...
---
_id: '25894'
abstract:
- lang: eng
  text: Powder X-ray diffraction (XRD) patterns of ordered mesoporous CMK-8 and CMK-9
    carbon materials are simulated by geometric modeling. The materials are amorphous
    at the atomic length scale but exhibit highly symmetric gyroidal structures at
    the nanometer scale, corresponding to regular, continuous nanopore systems with
    cubic symmetry. Their structures lead to characteristic low-angle XRD signatures.
    We introduce a model based on geometrical considerations to simulate CMK-8 and
    CMK-9 structures with variable volume fraction of carbon (vs. pore volume, i.e.,
    variable 'pore wall thickness'). In addition, we also simulate carbon materials
    with variable amounts of guest species (e.g., sulfur) residing in their pores.
    The corresponding XRD patterns are calculated. The carbon volume fraction turns
    out to have a significant impact on the relative diffraction peak intensities,
    especially in case of CMK-9 carbon that features a bimodal porosity. Likewise,
    the presence of guest species in the pores may also strongly affect the relative
    peak intensities. Our study suggests that careful evaluation of experimental low-angle
    XRD patterns of (real) CMK-8 or CMK-9 materials offers an opportunity to obtain
    detailed information about the nanostructural properties in addition to the mere
    identification of the pore systems geometry.
article_number: '110330'
article_type: original
author:
- first_name: Bertram
  full_name: Schwind, Bertram
  last_name: Schwind
- first_name: Jan-Henrik
  full_name: Smått, Jan-Henrik
  last_name: Smått
- first_name: Michael
  full_name: Tiemann, Michael
  id: '23547'
  last_name: Tiemann
  orcid: 0000-0003-1711-2722
- first_name: Christian
  full_name: Weinberger, Christian
  id: '11848'
  last_name: Weinberger
citation:
  ama: Schwind B, Smått J-H, Tiemann M, Weinberger C. Modeling of gyroidal mesoporous
    CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns. <i>Microporous
    and Mesoporous Materials</i>. Published online 2021. doi:<a href="https://doi.org/10.1016/j.micromeso.2020.110330">10.1016/j.micromeso.2020.110330</a>
  apa: Schwind, B., Smått, J.-H., Tiemann, M., &#38; Weinberger, C. (2021). Modeling
    of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction
    patterns. <i>Microporous and Mesoporous Materials</i>, Article 110330. <a href="https://doi.org/10.1016/j.micromeso.2020.110330">https://doi.org/10.1016/j.micromeso.2020.110330</a>
  bibtex: '@article{Schwind_Smått_Tiemann_Weinberger_2021, title={Modeling of gyroidal
    mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns},
    DOI={<a href="https://doi.org/10.1016/j.micromeso.2020.110330">10.1016/j.micromeso.2020.110330</a>},
    number={110330}, journal={Microporous and Mesoporous Materials}, author={Schwind,
    Bertram and Smått, Jan-Henrik and Tiemann, Michael and Weinberger, Christian},
    year={2021} }'
  chicago: Schwind, Bertram, Jan-Henrik Smått, Michael Tiemann, and Christian Weinberger.
    “Modeling of Gyroidal Mesoporous CMK-8 and CMK-9 Carbon Nanostructures and Their
    X-Ray Diffraction Patterns.” <i>Microporous and Mesoporous Materials</i>, 2021.
    <a href="https://doi.org/10.1016/j.micromeso.2020.110330">https://doi.org/10.1016/j.micromeso.2020.110330</a>.
  ieee: 'B. Schwind, J.-H. Smått, M. Tiemann, and C. Weinberger, “Modeling of gyroidal
    mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns,”
    <i>Microporous and Mesoporous Materials</i>, Art. no. 110330, 2021, doi: <a href="https://doi.org/10.1016/j.micromeso.2020.110330">10.1016/j.micromeso.2020.110330</a>.'
  mla: Schwind, Bertram, et al. “Modeling of Gyroidal Mesoporous CMK-8 and CMK-9 Carbon
    Nanostructures and Their X-Ray Diffraction Patterns.” <i>Microporous and Mesoporous
    Materials</i>, 110330, 2021, doi:<a href="https://doi.org/10.1016/j.micromeso.2020.110330">10.1016/j.micromeso.2020.110330</a>.
  short: B. Schwind, J.-H. Smått, M. Tiemann, C. Weinberger, Microporous and Mesoporous
    Materials (2021).
date_created: 2021-10-08T10:02:31Z
date_updated: 2023-03-07T10:44:44Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.micromeso.2020.110330
language:
- iso: eng
publication: Microporous and Mesoporous Materials
publication_identifier:
  issn:
  - 1387-1811
publication_status: published
quality_controlled: '1'
status: public
title: Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their
  X-Ray diffraction patterns
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '25897'
abstract:
- lang: eng
  text: A comparison of infrared spectroscopic analytical approaches was made in order
    to assess their applicability for internal structure characterization of SiO2
    thin films. Markers for porosity and/or disorder based on the analysis of the
    asymmetric stretching absorption band of SiO2 between 900−1350 cm−1 were discussed.
    The shape of this band, which shows a well-defined LO–TO splitting, depends not
    only on the inherent characteristics of the film under analysis but also on the
    particular geometry of the IR experiment and the specific surface selection rules
    of the substrate. Three types of SiO2 thin films with clearly defined porosity
    ranging from dense films to mesoporous films were investigated by transmission
    (at different incidence angles), direct specular reflection (at different angles),
    and diffuse reflection. Two different types of substrate, metallic and semiconducting,
    were used. The combined effect of substrate and specific technique in the final
    shape of the band, was discussed, and the efficacy for their applicability to
    the determination of porosity in thin SiO2 films was critically evaluated.
article_number: '103256'
article_type: original
author:
- first_name: Teresa
  full_name: de los Arcos, Teresa
  last_name: de los Arcos
- first_name: Hendrik
  full_name: Müller, Hendrik
  last_name: Müller
- first_name: Fuzeng
  full_name: Wang, Fuzeng
  last_name: Wang
- first_name: Varun Raj
  full_name: Damerla, Varun Raj
  last_name: Damerla
- first_name: Christian
  full_name: Hoppe, Christian
  last_name: Hoppe
- first_name: Christian
  full_name: Weinberger, Christian
  id: '11848'
  last_name: Weinberger
- first_name: Michael
  full_name: Tiemann, Michael
  id: '23547'
  last_name: Tiemann
  orcid: 0000-0003-1711-2722
- first_name: Guido
  full_name: Grundmeier, Guido
  id: '194'
  last_name: Grundmeier
citation:
  ama: de los Arcos T, Müller H, Wang F, et al. Review of infrared spectroscopy techniques
    for the determination of internal structure in thin SiO2 films. <i>Vibrational
    Spectroscopy</i>. Published online 2021. doi:<a href="https://doi.org/10.1016/j.vibspec.2021.103256">10.1016/j.vibspec.2021.103256</a>
  apa: de los Arcos, T., Müller, H., Wang, F., Damerla, V. R., Hoppe, C., Weinberger,
    C., Tiemann, M., &#38; Grundmeier, G. (2021). Review of infrared spectroscopy
    techniques for the determination of internal structure in thin SiO2 films. <i>Vibrational
    Spectroscopy</i>, Article 103256. <a href="https://doi.org/10.1016/j.vibspec.2021.103256">https://doi.org/10.1016/j.vibspec.2021.103256</a>
  bibtex: '@article{de los Arcos_Müller_Wang_Damerla_Hoppe_Weinberger_Tiemann_Grundmeier_2021,
    title={Review of infrared spectroscopy techniques for the determination of internal
    structure in thin SiO2 films}, DOI={<a href="https://doi.org/10.1016/j.vibspec.2021.103256">10.1016/j.vibspec.2021.103256</a>},
    number={103256}, journal={Vibrational Spectroscopy}, author={de los Arcos, Teresa
    and Müller, Hendrik and Wang, Fuzeng and Damerla, Varun Raj and Hoppe, Christian
    and Weinberger, Christian and Tiemann, Michael and Grundmeier, Guido}, year={2021}
    }'
  chicago: Arcos, Teresa de los, Hendrik Müller, Fuzeng Wang, Varun Raj Damerla, Christian
    Hoppe, Christian Weinberger, Michael Tiemann, and Guido Grundmeier. “Review of
    Infrared Spectroscopy Techniques for the Determination of Internal Structure in
    Thin SiO2 Films.” <i>Vibrational Spectroscopy</i>, 2021. <a href="https://doi.org/10.1016/j.vibspec.2021.103256">https://doi.org/10.1016/j.vibspec.2021.103256</a>.
  ieee: 'T. de los Arcos <i>et al.</i>, “Review of infrared spectroscopy techniques
    for the determination of internal structure in thin SiO2 films,” <i>Vibrational
    Spectroscopy</i>, Art. no. 103256, 2021, doi: <a href="https://doi.org/10.1016/j.vibspec.2021.103256">10.1016/j.vibspec.2021.103256</a>.'
  mla: de los Arcos, Teresa, et al. “Review of Infrared Spectroscopy Techniques for
    the Determination of Internal Structure in Thin SiO2 Films.” <i>Vibrational Spectroscopy</i>,
    103256, 2021, doi:<a href="https://doi.org/10.1016/j.vibspec.2021.103256">10.1016/j.vibspec.2021.103256</a>.
  short: T. de los Arcos, H. Müller, F. Wang, V.R. Damerla, C. Hoppe, C. Weinberger,
    M. Tiemann, G. Grundmeier, Vibrational Spectroscopy (2021).
date_created: 2021-10-08T10:09:45Z
date_updated: 2023-03-07T10:44:06Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
- _id: '302'
doi: 10.1016/j.vibspec.2021.103256
language:
- iso: eng
publication: Vibrational Spectroscopy
publication_identifier:
  issn:
  - 0924-2031
publication_status: published
quality_controlled: '1'
status: public
title: Review of infrared spectroscopy techniques for the determination of internal
  structure in thin SiO2 films
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '42812'
author:
- first_name: Alexander
  full_name: Olenberg, Alexander
  last_name: Olenberg
citation:
  ama: Olenberg A. <i>Untersuchung und Optimierung von strukturierten Packungen mittels
    CFD-Simulationen </i>.; 2021.
  apa: Olenberg, A. (2021). <i>Untersuchung und Optimierung von strukturierten Packungen
    mittels CFD-Simulationen </i>.
  bibtex: '@book{Olenberg_2021, title={Untersuchung und Optimierung von strukturierten
    Packungen mittels CFD-Simulationen }, author={Olenberg, Alexander}, year={2021}
    }'
  chicago: Olenberg, Alexander. <i>Untersuchung und Optimierung von strukturierten
    Packungen mittels CFD-Simulationen </i>, 2021.
  ieee: A. Olenberg, <i>Untersuchung und Optimierung von strukturierten Packungen
    mittels CFD-Simulationen </i>. 2021.
  mla: Olenberg, Alexander. <i>Untersuchung und Optimierung von strukturierten Packungen
    mittels CFD-Simulationen </i>. 2021.
  short: A. Olenberg, Untersuchung und Optimierung von strukturierten Packungen mittels
    CFD-Simulationen , 2021.
date_created: 2023-03-07T09:26:42Z
date_updated: 2023-03-07T09:26:48Z
department:
- _id: '145'
language:
- iso: ger
publication_identifier:
  isbn:
  - '9783843947855'
status: public
title: 'Untersuchung und Optimierung von strukturierten Packungen mittels CFD-Simulationen '
type: dissertation
user_id: '15324'
year: '2021'
...
