Topological quantum phase transition in magnetic topological insulator upon magnetization rotation
Topological quantum phase transition in magnetic topological insulator upon magnetization rotation
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DOI：
10.1103/physrevb.98.140404
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发表时间：
2018-10-22
影响因子：
3.7
通讯作者：
Tokura, Yoshinori
中科院分区：
文献类型：
--
作者：
Kawamura, Minoru;Mogi, Masataka;Tokura, Yoshinori
我们报道了在磁化旋转的磁性拓扑绝缘体中量子反常霍尔和平凡绝缘体相之间的连续相变。霍尔电导率从一个量子化的霍尔电导率平台e(2)/h过渡到另一个零霍尔电导率平台。在不同温度下的转变曲线几乎在一个点相交，说明了转变的临界行为。过渡曲线的斜率遵循幂律温度依赖性，临界指数为0.61。这表明在量子反常霍尔和量子霍尔系统之间的平台跃迁有一个共同的潜在起源，那就是一维手性边缘通道的渗透。
We report a continuous phase transition between quantum-anomalous-Hall and trivial-insulator phases in a magnetic topological insulator upon magnetization rotation. The Hall conductivity transits from one plateau of quantized Hall conductivity e(2)/h to the other plateau of zero Hall conductivity. The transition curves taken at various temperatures cross almost at a single point, exemplifying the critical behavior of the transition. The slope of the transition curves follows a power-law temperature dependence with a critical exponent of 0.61. This suggests a common underlying origin in the plateau transitions between the quantum anomalous Hall and quantum Hall systems, which is a percolation of one-dimensional chiral edge channels.