@article{7480, author = {{Poltavtsev, S. V. and Kosarev, A. N. and Akimov, I. A. and Yakovlev, D. R. and Sadofev, S. and Puls, J. and Hoffmann, S. P. and Albert, M. and Meier, Cedrik and Meier, Torsten and Bayer, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Time-resolved photon echoes from donor-bound excitons in ZnO epitaxial layers}}}, doi = {{10.1103/physrevb.96.035203}}, volume = {{96}}, year = {{2017}}, } @article{13332, author = {{Podzimski, Reinold and Duc, Huynh Thanh and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{20}}, title = {{{Anisotropic excitons and their contributions to shift current transients in bulk GaAs}}}, doi = {{10.1103/physrevb.96.205201}}, volume = {{96}}, year = {{2017}}, } @article{63040, author = {{Thevenard, L. and Boutigny, B. and Güsken, Nicholas Alexander and Becerra, L. and Ulysse, C. and Shihab, S. and Lemaître, A. and Kim, J.-V. and Jeudy, V. and Gourdon, C.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{5}}, publisher = {{American Physical Society (APS)}}, title = {{{Spin transfer and spin-orbit torques in in-plane magnetized (Ga,Mn)As tracks}}}, doi = {{10.1103/physrevb.95.054422}}, volume = {{95}}, year = {{2017}}, } @article{19210, author = {{Breddermann, D. and Heinze, Dirk Florian and Binder, R. and Zrenner, Artur and Schumacher, Stefan}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, title = {{{All-optical tailoring of single-photon spectra in a quantum-dot microcavity system}}}, doi = {{10.1103/physrevb.94.165310}}, year = {{2016}}, } @article{4814, author = {{Buß, J. H. and Schupp, T. and As, Donat Josef and Brandt, O. and Hägele, D. and Rudolph, J.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{23}}, publisher = {{American Physical Society (APS)}}, title = {{{Electron spin dynamics in cubic GaN}}}, doi = {{10.1103/physrevb.94.235202}}, volume = {{94}}, year = {{2016}}, } @article{7056, author = {{Onur, A. R. and de Jong, J. P. and O'Shea, D. and Reuter, Dirk and Wieck, A. D. and van der Wal, C. H.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{16}}, publisher = {{American Physical Society (APS)}}, title = {{{Stabilizing nuclear spins around semiconductor electrons via the interplay of optical coherent population trapping and dynamic nuclear polarization}}}, doi = {{10.1103/physrevb.93.161204}}, volume = {{93}}, year = {{2016}}, } @article{7068, author = {{Sokolov, P. S. and Petrov, M. Yu. and Mehrtens, T. and Müller-Caspary, K. and Rosenauer, A. and Reuter, Dirk and Wieck, A. D.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{4}}, publisher = {{American Physical Society (APS)}}, title = {{{Reconstruction of nuclear quadrupole interaction in (In,Ga)As/GaAs quantum dots observed by transmission electron microscopy}}}, doi = {{10.1103/physrevb.93.045301}}, volume = {{93}}, year = {{2016}}, } @article{15731, author = {{Thonig, Danny and Rauch, Tomáš and Mirhosseini, Hossein and Henk, Jürgen and Mertig, Ingrid and Wortelen, Henry and Engelkamp, Bernd and Schmidt, Anke B. and Donath, Markus}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, title = {{{Existence of topological nontrivial surface states in strained transition metals: W, Ta, Mo, and Nb}}}, doi = {{10.1103/physrevb.94.155132}}, year = {{2016}}, } @article{15733, author = {{Miyamoto, K. and Wortelen, H. and Mirhosseini, Hossein and Okuda, T. and Kimura, A. and Iwasawa, H. and Shimada, K. and Henk, J. and Donath, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, title = {{{Orbital-symmetry-selective spin characterization of Dirac-cone-like state on W(110)}}}, doi = {{10.1103/physrevb.93.161403}}, year = {{2016}}, } @article{31941, author = {{Winkler, K. and Egorov, O. A. and Savenko, I. G. and Ma, Xuekai and Estrecho, E. and Gao, T. and Müller, S. and Kamp, M. and Liew, T. C. H. and Ostrovskaya, E. A. and Höfling, S. and Schneider, C.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{12}}, publisher = {{American Physical Society (APS)}}, title = {{{Collective state transitions of exciton-polaritons loaded into a periodic potential}}}, doi = {{10.1103/physrevb.93.121303}}, volume = {{93}}, year = {{2016}}, } @article{31940, author = {{Yulin, A. V. and Chestnov, I. Yu. and Ma, Xuekai and Schumacher, S. and Peschel, U. and Egorov, O. A.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{5}}, publisher = {{American Physical Society (APS)}}, title = {{{Dynamics of exciton-polaritons in discrete lattices under incoherent localized pumping}}}, doi = {{10.1103/physrevb.94.054312}}, volume = {{94}}, year = {{2016}}, } @article{31942, author = {{Ma, Xuekai and Peschel, Ulf and Egorov, Oleg A.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Incoherent control of topological charges in nonequilibrium polariton condensates}}}, doi = {{10.1103/physrevb.93.035315}}, volume = {{93}}, year = {{2016}}, } @article{10026, abstract = {{Congruent lithium niobate and lithium tantalate mixed crystals have been grown over the complete compositional range with the Czochralski method. The structural and vibrational properties of the mixed crystals are studied extensively by x-ray diffraction measurements, Raman spectroscopy, and density functional theory. The measured lattice parameters and vibrational frequencies are in good agreement with our theoretical predictions. The observed dependence of the Raman frequencies on the crystal composition is discussed on the basis of the calculated phonon displacement patterns. The phononic contribution to the static dielectric tensor is calculated by means of the generalized Lyddane-Sachs-Teller relation. Due to the pronounced dependence of the optical response on the Ta concentration, lithium niobate tantalate mixed crystals represent a perfect model system to study the properties of uniaxial mixed ferroelectric materials for application in integrated optics.}}, author = {{Rüsing, Michael and Sanna, Simone and Neufeld, Sergej and Berth, Gerhard and Schmidt, Wolf Gero and Zrenner, Artur and Yu, H. and Wang, Y. and Zhang, H.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, title = {{{Vibrational properties of LiNb1−xTaxO3 mixed crystals}}}, doi = {{10.1103/physrevb.93.184305}}, year = {{2016}}, } @article{22942, abstract = {{A microscopic approach that is based on the multisubband semiconductor Bloch equations formulated in the basis of a 14-band k⋅p model is employed to compute the temporal dynamics of photocurrents in GaAs quantum wells following excitation with femtosecond laser pulses. This approach provides a transparent description of the interband, intersubband, and intraband excitations, fully includes all resonant as well as off-resonant excitations, and treats the light-matter interaction nonperturbatively. For linearly polarized excitations, the photocurrents contain contributions from shift and rectification currents. We numerically compute and analyze these currents generated by excitation with femtosecond laser pulses for [110]- and [111]-oriented GaAs quantum wells. It is shown that the often employed perturbative χ(2) approach breaks down for peak fields larger than about 10 kV/cm, and that nonperturbative effects lead to a reduction of the peak values of the shift and rectification currents and to temporal oscillations that originate from Rabi flopping. In particular, we find a complex oscillatory photon energy dependence of the magnitudes of the shift and rectification currents. Our simulations demonstrate that this dependence is the result of mixing between the heavy- and light-hole valence bands. This is a surprising finding since the band mixing has an even larger influence on the strength of the photocurrents than the absorption coefficient. For [110]-oriented GaAs quantum wells, the calculated photon energy dependence is compared to experimental results, and good agreement is obtained. This validates our theoretical approach.}}, author = {{Duc, Huynh Thanh and Podzimski, Reinold and Priyadarshi, Shekhar and Bieler, Mark and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{8}}, publisher = {{American Physical Society}}, title = {{{Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing}}}, doi = {{10.1103/physrevb.94.085305}}, volume = {{94}}, year = {{2016}}, } @article{13920, abstract = {{We investigate the transient optical response in high-quality Cd0.88Zn0.12Te crystals in the regime of slow light propagation on the lower exciton-polariton branch. Femtosecond photoexcitation leads to very substantial transmission changes in a ∼10-meV broad spectral range within the transparency window of the unexcited semiconductor. These nonlinear optical signatures decay on picosecond time scales governed by carrier thermalization and recombination. The temporal and spectral dependence indicate the dynamical optical response as arising from excitation-induced dephasing and perturbed free induction decay. Model simulations for the optical response taking into account the actual exciton-polariton dispersion and excitation-induced dephasing of a nonlinearly driven two-level system support this interpretation.}}, author = {{Lohrenz, J. and Melzer, S. and Ruppert, C. and Akimov, I. A. and Mariette, H. and Reichelt, Matthias and Trautmann, Alexander and Meier, Torsten and Betz, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{Ultrafast dynamical response of the lower exciton-polariton branch in CdZnTe}}}, doi = {{10.1103/physrevb.93.075201}}, volume = {{93}}, year = {{2016}}, } @article{10024, abstract = {{The influence of electronic many-body interactions, spin-orbit coupling, and thermal lattice vibrations on the electronic structure of lithium niobate is calculated from first principles. Self-energy calculations in the GW approximation show that the inclusion of self-consistency in the Green function G and the screened Coulomb potential W opens the band gap far stronger than found in previous G0W0 calculations but slightly overestimates its actual value due to the neglect of excitonic effects in W. A realistic frozen-lattice band gap of about 5.9 eV is obtained by combining hybrid density functional theory with the QSGW0 scheme. The renormalization of the band gap due to electron-phonon coupling, derived here using molecular dynamics as well as density functional perturbation theory, reduces this value by about 0.5 eV at room temperature. Spin-orbit coupling does not noticeably modify the fundamental gap but gives rise to a Rashba-like spin texture in the conduction band.}}, author = {{Riefer, Arthur and Friedrich, Michael and Sanna, Simone and Gerstmann, Uwe and Schindlmayr, Arno and Schmidt, Wolf Gero}}, issn = {{2469-9969}}, journal = {{Physical Review B}}, number = {{7}}, publisher = {{American Physical Society}}, title = {{{LiNbO3 electronic structure: Many-body interactions, spin-orbit coupling, and thermal effects}}}, doi = {{10.1103/PhysRevB.93.075205}}, volume = {{93}}, year = {{2016}}, } @article{13485, author = {{Sanna, S. and Dues, C. and Schmidt, Wolf Gero and Timmer, F. and Wollschläger, J. and Franz, M. and Appelfeller, S. and Dähne, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{19}}, title = {{{Rare-earth silicide thin films on the Si(111) surface}}}, doi = {{10.1103/physrevb.93.195407}}, volume = {{93}}, year = {{2016}}, } @article{13481, author = {{Jeckelmann, Eric and Sanna, Simone and Schmidt, Wolf Gero and Speiser, Eugen and Esser, Norbert}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{24}}, title = {{{Grand canonical Peierls transition in In/Si(111)}}}, doi = {{10.1103/physrevb.93.241407}}, volume = {{93}}, year = {{2016}}, } @article{13478, author = {{Speiser, E. and Esser, N. and Wippermann, S. and Schmidt, Wolf Gero}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{Surface vibrational Raman modes of In:Si(111)(4×1)and(8×2)nanowires}}}, doi = {{10.1103/physrevb.94.075417}}, volume = {{94}}, year = {{2016}}, } @article{13488, author = {{Miccoli, I. and Edler, F. and Pfnür, H. and Appelfeller, S. and Dähne, M. and Holtgrewe, K. and Sanna, S. and Schmidt, Wolf Gero and Tegenkamp, C.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, title = {{{Atomic size effects studied by transport in single silicide nanowires}}}, doi = {{10.1103/physrevb.93.125412}}, year = {{2016}}, }