Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Claudia Rödl"'
Publikováno v:
Physical Review Materials. 7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93a3d06003199188da3949ffcd105735
https://doi.org/10.1103/physrevmaterials.7.014602
https://doi.org/10.1103/physrevmaterials.7.014602
Autor:
Silvana Botti, Friedhelm Bechstedt, Pedro Borlido, Claudia Rödl, Jens Renè Suckert, Jürgen Furthmüller
Publikováno v:
Physical Review Materials. 5
We present ab initio calculations of the electronic and optical properties of hexagonal SiGe alloys in the lonsdaleite structure. Lattice constants and electronic band structures in excellent agreement with experiment are obtained using density-funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0f9ea05f504ffa63df302488fcd7d43
https://doi.org/10.1103/physrevmaterials.5.114604
https://doi.org/10.1103/physrevmaterials.5.114604
Autor:
D. Busse, Alain Dijkstra, Jens Renè Suckert, Claudia Rödl, M. A. J. V. Tilburg, V. T. V. Lange, Jos E. M. Haverkort, Marcel A. Verheijen, Jürgen Furthmüller, Silvana Botti, Erik P. A. M. Bakkers, Elham M. T. Fadaly, Friedhelm Bechstedt, Jonathan J. Finley
Publikováno v:
2020 Conference on Lasers and Electro-Optics, CLEO 2020-Proceedings
Hexagonal SiGe is a direct bandgap semiconductor due to zone folding. A Lasher- Stern-Wurfel fit of the photoluminescence spectrum unambiguously confirms band- to-band recombination. The transition matrix elements are large since the translational sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca14ddf3f9482d4a76c85e2cebd4b332
https://research.tue.nl/nl/publications/01dfd7f2-f90f-4892-a059-74055f85bfcf
https://research.tue.nl/nl/publications/01dfd7f2-f90f-4892-a059-74055f85bfcf
Autor:
Heinz Schmid, Jürgen Furthmüller, Marcel A. Verheijen, Sebastian Kölling, Alain Dijkstra, Erik P. A. M. Bakkers, Friedhelm Bechstedt, Jens Renè Suckert, Elham M. T. Fadaly, Jos E. M. Haverkort, M. A. J. V. Tilburg, Jonathan J. Finley, Dorian Ziss, V. T. V. Lange, Julian Stangl, Silvana Botti, Philipp Staudinger, D. Busse, Claudia Rödl
Publikováno v:
Novel In-Plane Semiconductor Lasers XIX.
Hexagonal SiGe has been theoretically shown to feature a tunable direct bandgap in the range 0.4-0.8eV. We study arrays of site-selectively grown Si_(1-x)-Ge_x nanowires (NWs) grown using the crystal transfer method in which wurtzite GaP core NWs are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a381043b1eb8ff0580bffa1e0eecc0a7
https://doi.org/10.1117/12.2544968
https://doi.org/10.1117/12.2544968
Autor:
V. T. V. Lange, Claudia Rödl, Erik P. A. M. Bakkers, Alain Dijkstra, D. Busse, Elham M. T. Fadaly, Marcel A. Verheijen, Friedhelm Bechstedt, Jos E. M. Haverkort, Jens Renè Suckert, Jürgen Furthmüller, Jonathan J. Finley, Silvana Botti, M. A. J. V. Tilburg
Publikováno v:
Conference on Lasers and Electro-Optics.
Hexagonal SiGe is shown to feature a direct bandgap with a radiative strength comparable to InP. Surprisingly, it features a temperature independent emission strength, thus promising a silicon compatible laser tunable from 1.8 to 3.5 pm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32be338a40472b99c5d851726a8a6c78
https://doi.org/10.1364/cleo_si.2020.sm3m.6
https://doi.org/10.1364/cleo_si.2020.sm3m.6
Autor:
Michael Seifert, Silvana Botti, Stefan Jaschik, Mário R. G. Marques, Miguel A. L. Marques, Claudia Rödl
Publikováno v:
Chemistry of Materials
We perform an exhaustive theoretical study of the phase diagram of Cu-I binaries, focusing on Cu-poor compositions, relevant for p-type transparent conduction. We find that the interaction between neighboring Cu vacancies is the determining factor th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c05890842086e89a188d5697a9b25ef9
Publikováno v:
2D Materials. 5:035010
We perform ab initio structure-prediction calculations of the low-energy crystal structures of two-dimensional silicon. Besides the well-known silicene and a few other allotropes proposed earlier in the literature, we discover a wealth of new phases
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d3dd48e6336914df7b88856d34552b6
https://doi.org/10.1088/2053-1583/aab9ea
https://doi.org/10.1088/2053-1583/aab9ea
Publikováno v:
physica status solidi (b). 246:2150-2153
We use Hedin's GW framework to compute quasiparticle bands for group-II monoxides in wurtzite (wz) structure. Modern hybrid density functional theory is applied to compute the starting electronic structure for the solution of the quasiparticle equati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73385b61e77811502108bdea15e7573a
https://doi.org/10.1002/pssb.200945204
https://doi.org/10.1002/pssb.200945204
Publikováno v:
Journal of Chemical Theory and Computation
We studied the influence of strong electron correlation on magnetic properties of Si nanocrystals doped with the transition metal (TM) atoms Mn and Fe. Different approaches to describe exchange and correlation (XC) effects are compared within a densi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d606b1c0e59c7c23888ce94410ef777
https://pubmed.ncbi.nlm.nih.gov/26617294
https://pubmed.ncbi.nlm.nih.gov/26617294
Autor:
Anderson Janotti, Patrick Rinke, Claudia Rödl, Friedhelm Bechstedt, Emmanouil Kioupakis, Andre Schleife, Chris G. Van de Walle, Matthias Scheffler
Publikováno v:
Physical Review Letters
The study of the oxygen vacancy (F center) in MgO has been aggravated by the fact that the positively charged and the neutral vacancy (F+ and F0, respectively) absorb at practically identical energies. Here we apply many-body perturbation theory in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98513015e42f41b98da4b4eb2cd265ad
https://hdl.handle.net/11858/00-001M-0000-000F-D1AE-E21.11116/0000-0005-AE40-F21.11116/0000-0005-AE41-E11858/00-001M-0000-000F-C6E7-9
https://hdl.handle.net/11858/00-001M-0000-000F-D1AE-E21.11116/0000-0005-AE40-F21.11116/0000-0005-AE41-E11858/00-001M-0000-000F-C6E7-9