期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.247208
关键词
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资金
- MEXT [21244053]
- Strategic International Cooperative Program from Japan Science and Technology Agency
- Japan Society for the Promotion of Science (JSPS) through the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)
- DFG research unit [FOR 723]
- MEXT
- DAAD
We study the magnetic susceptibility of a layered semiconductor BiTeI with giant Rashba spin splitting both theoretically and experimentally to explore its orbital magnetism. Apart from the core contributions, a large temperature-dependent diamagnetic susceptibility is observed when the Fermi energy E-F is near the crossing point of the Rashba spin-split conduction bands at the time-reversal symmetry point A. On the other hand, when E-F is below this band crossing, the susceptibility turns to be paramagnetic. These features are consistent with first-principles calculations, which also predict an enhanced orbital magnetic susceptibility with both positive and negative signs as a function of E-F due to band (anti) crossings. Based on these observations, we propose two mechanisms for the enhanced paramagnetic orbital susceptibility.
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