期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.167401
关键词
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资金
- MEXT [19048008, 19048015, 20740167, 24224009, 24244054]
- Strategic International Cooperative Program (Joint Research Type) from Japan Science and Technology Agency
- Japan Society for the Promotion of Science (JSPS) through its Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)''
- DFG Research Unit [FOR 723]
- Hungarian Research Funds [OTKA PD75615, CNK80991, Bolyai 00256/08/11, TAMOP-4.2.2.B-10/12010-0009]
- Ministry for Education and Research (Bundesministerium fur Bildung und Forschung)
- Ministry for Science, Research and Arts Baden-Wurttemberg (Ministerium fur Wissenschaft, Forschung und Kunst Baden-Wurttemberg)
- MEXT
- DAAD
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.
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