Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 81, Issue 1, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.81.013704
Keywords
Dirac electron; spin polarized electric current; bismuth; Kubo formula
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Funding
- MRL System
- Osaka University
- Japan Society for the Promotion of Science [23740269]
- Grants-in-Aid for Scientific Research [23740269] Funding Source: KAKEN
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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.
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