Spin-Polarization in Magneto-Optical Conductivity of Dirac Electrons
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概要
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A mechanism is proposed based on the Kubo formula to generate a spin-polarized magneto-optical current of Dirac electrons in solids which have strong spin--orbit interactions such as bismuth. The ac current response functions are calculated in the isotropic Wolff model under an external magnetic field, and the selection rules for Dirac electrons are obtained. By using the circularly polarized light and tuning its frequency, one can excite electrons concentrated in the spin-polarized lowest Landau level when the chemical potential locates in the band gap, so that spin-polarization in the magneto-optical current can be achieved.
- 2012-01-15
著者
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Ogata Masao
Department Of Basic Science Graduate School Of Arts And Science University Of Tokyo
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Fukuyama Hidetoshi
Department of Applied Physics and Research Institute for Science and Technology, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Fuseya Yuki
Department of Materials Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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