Quantum Anomalous Hall Effect in Hg 1 − y Mn y Te Quantum Wells
作者： Chao-Xing Liu , Xiao-Liang Qi , Xi Dai , Zhong Fang , Shou-Cheng Zhang
DOI: 10.1103/PHYSREVLETT.101.146802
关键词: Quantum anomalous Hall effect 、 Condensed matter physics 、 Metal 、 Carbon nanotube 、 Materials science 、 Nitrogen 、 Quantum well 、 Magnetic semiconductor 、 Boron
摘要: 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 Hg 1− y Mn y Te 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 …
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