Enhanced infrared magneto-optical response of the nonmagnetic semiconductor BiTel driven by bulk Rashba splitting
- We study the magneto-optical (MO) response of the polar semiconductor BiTeI with giant bulk Rashba spin splitting at various carrier densities. Despite being nonmagnetic, the material is found to yield a huge MO activity in the infrared region under moderate magnetic fields (up to 3 T). Our first-principles calculations show that the enhanced MO response of BiTeI comes mainly from the intraband transitions between the Rashba-split bulk conduction bands. These transitions connecting electronic states with opposite spin directions become active due to the presence of strong spin-orbit interaction and give rise to distinct features in the MO spectra with a systematic doping dependence. We predict an even more pronounced enhancement in the low-energy MO response and dc Hall effect near the crossing (Dirac) point of the conduction bands.
| Author: | L. Demkó, G. A. H. Schober, V. Kocsis, M. S. Bahramy, H. Murakawa, J. S. Lee, István KézsmárkiORCiDGND, R. Arita, N. Nagaosa, Y. Tokura |
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| URN: | urn:nbn:de:bvb:384-opus4-437040 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/43704 |
| ISSN: | 0031-9007OPAC |
| ISSN: | 1079-7114OPAC |
| Parent Title (English): | Physical Review Letters |
| Publisher: | American Physical Society (APS) |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2012 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2018/11/19 |
| Volume: | 109 |
| Issue: | 16 |
| First Page: | 167401 |
| DOI: | https://doi.org/10.1103/physrevlett.109.167401 |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  Deutsches Urheberrecht |
