Quantum spin hall effect
Quantum spin hall effect
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DOI：
10.1103/physrevlett.96.106802
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发表时间：
2006-03-17
影响因子：
8.6
通讯作者：
Zhang, SC
中科院分区：
文献类型：
--
作者：
Bernevig, BA;Zhang, SC
量子霍尔液体是一种新的物质状态，具有深刻的涌现性质，如分数电荷和统计。量子霍尔效应的存在需要由外部磁场引起的时间反演对称性的破坏。在这项工作中，我们预测在没有任何磁场的情况下，量子化的自旋霍尔效应，其中的内在自旋霍尔电导量子化的单位为2 e/4 π。简并量子朗道能级是在应变梯度存在的情况下由常规半导体中的自旋轨道耦合产生的。这种新的物质状态有许多深刻的相关性质，由拓扑场论描述。
The quantum Hall liquid is a novel state of matter with profound emergent properties such as fractional charge and statistics. The existence of the quantum Hall effect requires breaking of the time reversal symmetry caused by an external magnetic field. In this work, we predict a quantized spin Hall effect in the absence of any magnetic field, where the intrinsic spin Hall conductance is quantized in units of 2e/4 pi. The degenerate quantum Landau levels are created by the spin-orbit coupling in conventional semiconductors in the presence of a strain gradient. This new state of matter has many profound correlated properties described by a topological field theory.