@article{7989, author = {{Kreisbeck, Christoph and Kramer, Tobias and Buchholz, Sven S. and Fischer, Saskia F. and Kunze, Ulrich and Reuter, Dirk and Wieck, Andreas D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{16}}, publisher = {{American Physical Society (APS)}}, title = {{{Phase shifts and phaseπjumps in four-terminal waveguide Aharonov-Bohm interferometers}}}, doi = {{10.1103/physrevb.82.165329}}, volume = {{82}}, year = {{2010}}, } @article{4174, abstract = {{A quantum dot molecule doped with a single electron in the presence of diagonal and off-diagonal carrierphonon couplings is studied by means of a nonperturbative quantum kinetic theory. The interaction with acoustic phonons by deformation potential and piezoelectric coupling is taken into account. We show that the phonon-mediated relaxation is fast on a picosecond time scale and is dominated by the usually neglected off-diagonal coupling to the lattice degrees of freedom leading to phonon-assisted electron tunneling. We show that in the parameter regime of current electrical and optical experiments, the microscopic non-Markovian theory has to be employed.}}, author = {{Grodecka-Grad, A. and Förstner, Jens}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, keywords = {{tet_topic_qd}}, number = {{11}}, publisher = {{American Physical Society (APS)}}, title = {{{Theory of phonon-mediated relaxation in doped quantum dot molecules}}}, doi = {{10.1103/physrevb.81.115305}}, volume = {{81}}, year = {{2010}}, } @article{4200, abstract = {{We studied the Fulde-Ferrell-Larkin-Ovchinnikov-type state established due to the proximity effect in superconducting Nb/Cu_41Ni_59 bilayers. Using a special wedge-type deposition technique, series of 20–35 samples could be fabricated by magnetron sputtering during one run. The layer thickness of only a few nanometers, the composition of the alloy, and the quality of interfaces were controlled by Rutherford backscattering spectrometry, high-resolution transmission electron microscopy, and Auger spectroscopy. The magnetic properties of the ferromagnetic alloy layer were characterized with superconducting quantum interference device magnetometry. These studies yield precise information about the thickness and demonstrate the homogeneity of the alloy composition and magnetic properties along the sample series. The dependencies of the critical temperature on the Nb and Cu41Ni59 layer thickness, T_c(d_S) and T_c(d_F), were investigated for constant thickness d_F of the magnetic alloy layer and d_S of the superconducting layer, respectively. All types of nonmonotonic behaviors of T_c versus d_F predicted by the theory could be realized experimentally, from reentrant superconducting behavior with a broad extinction region to a slight suppression of superconductivity with a shallow minimum. Even a double extinction of superconductivity was observed, giving evidence for the multiple reentrant behavior predicted by theory. All critical temperature curves were fitted with suitable sets of parameters. Then, T_c(d_F) diagrams of a hypothetical ferromagnet/superconductor/ferromagnet spin-switch core structure were calculated using these parameters. Finally, superconducting spin-switch fabrication issues are discussed in detail in view of the achieved results.}}, author = {{Zdravkov, V. I. and Kehrle, J. and Obermeier, G. and Gsell, S. and Schreck, M. and Müller, C. and Krug von Nidda, H.-A. and Lindner, Jörg and Moosburger-Will, J. and Nold, E. and Morari, R. and Ryazanov, V. V. and Sidorenko, A. S. and Horn, S. and Tidecks, R. and Tagirov, L. R.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{5}}, publisher = {{American Physical Society (APS)}}, title = {{{Reentrant superconductivity in superconductor/ferromagnetic-alloy bilayers}}}, doi = {{10.1103/physrevb.82.054517}}, volume = {{82}}, year = {{2010}}, } @article{4204, abstract = {{A comparative theoretical investigation of carbon interstitials in silicon is presented. Calculations using classical potentials are compared to first-principles density-functional theory calculations of the geometries, formation, and activation energies of the carbon dumbbell interstitial, showing the importance of a quantummechanical description of this system. In contrast to previous studies, the present first-principles calculations of the interstitial carbon migration path yield an activation energy that excellently matches the experiment. The bond-centered interstitial configuration shows a net magnetization of two electrons, illustrating the need for spin-polarized calculations.}}, author = {{Zirkelbach, F. and Stritzker, B. and Nordlund, K. and Lindner, Jörg and Schmidt, W. G. and Rauls, E.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{9}}, publisher = {{American Physical Society (APS)}}, title = {{{Defects in carbon implanted silicon calculated by classical potentials and first-principles methods}}}, doi = {{10.1103/physrevb.82.094110}}, volume = {{82}}, year = {{2010}}, } @article{15846, author = {{Schumacher, Stefan and Galbraith, Ian and Ruseckas, Arvydas and Turnbull, Graham A. and Samuel, Ifor D. W.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Dynamics of photoexcitation and stimulated optical emission in conjugated polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations approach}}}, doi = {{10.1103/physrevb.81.245407}}, year = {{2010}}, } @article{13656, author = {{Bihler, C. and Gerstmann, Uwe and Hoeb, M. and Graf, T. and Gjukic, M. and Schmidt, Wolf Gero and Stutzmann, M. and Brandt, M. S.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{20}}, title = {{{Manganese-hydrogen complexes inGa1−xMnxN}}}, doi = {{10.1103/physrevb.80.205205}}, volume = {{80}}, year = {{2010}}, } @article{13828, author = {{Zirkelbach, F. and Stritzker, B. and Nordlund, K. and Lindner, J. K. N. and Schmidt, Wolf Gero and Rauls, E.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{9}}, title = {{{Defects in carbon implanted silicon calculated by classical potentials and first-principles methods}}}, doi = {{10.1103/physrevb.82.094110}}, volume = {{82}}, year = {{2010}}, } @article{13832, author = {{Thierfelder, C. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{11}}, title = {{{First-principles study of water adsorption and a high-density interfacial ice structure on(1×1)-O/Rh(111)}}}, doi = {{10.1103/physrevb.82.115402}}, volume = {{82}}, year = {{2010}}, } @article{13833, author = {{Sanna, Simone and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{21}}, title = {{{Lithium niobateX-cut,Y-cut, andZ-cut surfaces fromab initiotheory}}}, doi = {{10.1103/physrevb.81.214116}}, volume = {{81}}, year = {{2010}}, } @article{13836, author = {{Rauls, E. and Blankenburg, S. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{12}}, title = {{{Chemical reactivity on surfaces: Modeling the imide synthesis from DATP and PTCDA on Au(111)}}}, doi = {{10.1103/physrevb.81.125401}}, volume = {{81}}, year = {{2010}}, } @article{4177, abstract = {{Excitonic spectra of weakly disordered semiconductor heterostructures are simulated on the basis of a one-dimensional tight-binding model. The influence of the length scale of weak disorder in quantum wells on the redshift of the excitonic peak and its linewidth is studied. By calculating two-dimensional Fouriertransform spectra we are able to determine the contribution of disorder to inhomogeneous and also to homogeneous broadenings separately. This disorder-induced dephasing is related to a Fano-type coupling and leads to contributions to the homogeneous linewidth that depends on energy within the inhomogeneously broadened line. The model includes heavy- and light-hole excitons and yields smaller inhomogeneous broadening for the light-hole exciton if compared to the heavy-hole exciton, which agrees qualitatively with the experiment.}}, author = {{Kuznetsova, I. and Gőgh, N. and Förstner, Jens and Meier, Torsten and Cundiff, S. T. and Varga, I. and Thomas, P.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, keywords = {{tet_topic_qw}}, number = {{7}}, publisher = {{American Physical Society (APS)}}, title = {{{Modeling excitonic line shapes in weakly disordered semiconductor nanostructures}}}, doi = {{10.1103/physrevb.81.075307}}, volume = {{81}}, year = {{2010}}, } @article{4127, abstract = {{The dynamics of charge and spin injection currents excited by circularly polarized, one-color laser beams in semiconductor quantum wells is analyzed. Our microscopic approach is based on a 14x14 k · p band-structure theory in combination with multisubband semiconductor Bloch equations which allows a detailed analysis of the photogenerated carrier distributions and coherences in k space. Charge and spin injection currents are numerically calculated for [110]- and [001]-grown GaAs quantum wells including dc population contributions and ac contributions that arise from intersubband coherences. The dependencies of the injection currents on the excitation conditions, in particular, the photon energy are computed and discussed.}}, author = {{Duc, Huynh Thanh and Förstner, Jens and Meier, Torsten}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, keywords = {{tet_topic_qw}}, number = {{11}}, publisher = {{American Physical Society (APS)}}, title = {{{Microscopic analysis of charge and spin photocurrents injected by circularly polarized one-color laser pulses in GaAs quantum wells}}}, doi = {{10.1103/physrevb.82.115316}}, volume = {{82}}, year = {{2010}}, } @article{1734, author = {{Zentgraf, Thomas and Zhang, Shuang and Oulton, Rupert F. and Zhang, Xiang}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{19}}, publisher = {{American Physical Society (APS)}}, title = {{{Ultranarrow coupling-induced transparency bands in hybrid plasmonic systems}}}, doi = {{10.1103/physrevb.80.195415}}, volume = {{80}}, year = {{2009}}, } @article{8578, author = {{Wilde, M. A. and Reuter, Dirk and Heyn, Ch. and Wieck, A. D. and Grundler, D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Inversion-asymmetry-induced spin splitting observed in the quantum oscillatory magnetization of a two-dimensional electron system}}}, doi = {{10.1103/physrevb.79.125330}}, year = {{2009}}, } @article{8581, author = {{Greilich, A. and Spatzek, S. and Yugova, I. A. and Akimov, I. A. and Yakovlev, D. R. and Efros, Al. L. and Reuter, Dirk and Wieck, A. D. and Bayer, M.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Collective single-mode precession of electron spins in an ensemble of singly charged (In,Ga)As/GaAs quantum dots}}}, doi = {{10.1103/physrevb.79.201305}}, year = {{2009}}, } @article{8584, author = {{Wilde, M. A. and Reuter, Dirk and Heyn, Ch. and Wieck, A. D. and Grundler, D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Inversion-asymmetry-induced spin splitting observed in the quantum oscillatory magnetization of a two-dimensional electron system}}}, doi = {{10.1103/physrevb.79.125330}}, year = {{2009}}, } @article{8586, author = {{Völk, S. and Wixforth, A. and Reuter, Dirk and Wieck, A. D. and Ebbecke, J.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Conversion of bound excitons to free excitons by surface acoustic waves}}}, doi = {{10.1103/physrevb.80.165307}}, year = {{2009}}, } @article{8587, author = {{Auer, T. and Oulton, R. and Bauschulte, A. and Yakovlev, D. R. and Bayer, M. and Verbin, S. Yu. and Cherbunin, R. V. and Reuter, Dirk and Wieck, A. D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Measurement of the Knight field and local nuclear dipole-dipole field in an InGaAs/GaAs quantum dot ensemble}}}, doi = {{10.1103/physrevb.80.205303}}, year = {{2009}}, } @article{8592, author = {{Kurtze, H. and Seebeck, J. and Gartner, P. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Bayer, M. and Jahnke, F.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, title = {{{Carrier relaxation dynamics in self-assembled semiconductor quantum dots}}}, doi = {{10.1103/physrevb.80.235319}}, year = {{2009}}, } @article{13655, author = {{Thissen, P. and Grundmeier, G. and Wippermann, S. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{24}}, title = {{{Water adsorption on the α-Al2O3(0001) surface}}}, doi = {{10.1103/physrevb.80.245403}}, volume = {{80}}, year = {{2009}}, }