Landau level spectroscopy of Dirac electrons in a polar semiconductor with giant Rashba spin splitting.

  title={Landau level spectroscopy of Dirac electrons in a polar semiconductor with giant Rashba spin splitting.},
  author={S{\'a}ndor Bord{\'a}cs and Joseph G. Checkelsky and Hiroshi Murakawa and Harold Y. Hwang and Yoshinori Tokura},
  journal={Physical review letters},
  volume={111 16},
Optical excitations of BiTeI with large Rashba spin splitting have been studied in an external magnetic field (B) applied parallel to the polar axis. A sequence of transitions between the Landau levels (LLs), whose energies are in proportion to √B were observed, being characteristic of massless Dirac electrons. The large separation energy between the LLs makes it possible to detect the strongest cyclotron resonance even at room temperature in moderate fields. Unlike in 2D Dirac systems, the… 
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Landau Level Spectroscopy


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