Optical Hall effect in the integer quantum Hall regime.

  title={Optical Hall effect in the integer quantum Hall regime.},
  author={Yohei Ikebe and Takahiro Morimoto and Ryuichi Masutomi and Tohru Okamoto and Hideo Aoki and Ryo Shimano},
  journal={Physical review letters},
  volume={104 25},
Optical Hall conductivity σ{xy}(ω) is measured from the Faraday rotation for a GaAs/AlGaAs heterojunction quantum Hall system in the terahertz-frequency regime. The Faraday rotation angle (∼ fine-structure constant ∼ mrad) is found to significantly deviate from the Drude-like behavior to exhibit a plateaulike structure around the Landau-level filling ν=2. The result, which fits with the behavior expected from the carrier localization effect in the ac regime, indicates that the plateau structure… 

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