Quantum Anomalous Hall Effect in Hg1yMnyTe Quantum Wells

Chao-Xing Liu, Xiao-Liang Qi, Xi Dai, Zhong Fang, and Shou-Cheng Zhang
Phys. Rev. Lett. 101, 146802 – Published 1 October 2008

Abstract

The quantum Hall effect is usually observed when a two-dimensional electron gas is subjected to an external magnetic field, so that their quantum states form Landau levels. In this work we predict that a new phenomenon, the quantum anomalous Hall effect, can be realized in Hg1yMnyTe quantum wells, without an external magnetic field and the associated Landau levels. This effect arises purely from the spin polarization of the Mn atoms, and the quantized Hall conductance is predicted for a range of quantum well thickness and the concentration of the Mn atoms. This effect enables dissipationless charge current in spintronics devices.

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  • Received 20 February 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.146802

©2008 American Physical Society

Authors & Affiliations

Chao-Xing Liu1,2, Xiao-Liang Qi2, Xi Dai3, Zhong Fang3, and Shou-Cheng Zhang2

  • 1Center for Advanced Study, Tsinghua University, Beijing, 100084, China
  • 2Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA
  • 3Institute of Physics, Chinese Academy of Sciences, Beijing, 100080, China

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Issue

Vol. 101, Iss. 14 — 3 October 2008

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