Optical Hall Effect in the Integer Quantum Hall Regime

Y. Ikebe, T. Morimoto, R. Masutomi, T. Okamoto, H. Aoki, and R. Shimano
Phys. Rev. Lett. 104, 256802 – Published 23 June 2010

Abstract

Optical Hall conductivity σxy(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, although not quantized, still exists in the terahertz regime.

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  • Received 29 March 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.256802

©2010 American Physical Society

Authors & Affiliations

Y. Ikebe, T. Morimoto, R. Masutomi, T. Okamoto, H. Aoki, and R. Shimano

  • Department of Physics, The University of Tokyo, Hongo, Tokyo 113-0033, Japan

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Issue

Vol. 104, Iss. 25 — 25 June 2010

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