论文标题
磁性绝缘体的量化运输中的自旋波动
Spin fluctuations in quantized transport of magnetic topological insulators
论文作者
论文摘要
在磁性拓扑绝缘子中，量化的电子传输与自发的磁性顺序交织在一起，因为磁化控制通过交换相互作用控制带隙，因此带拓扑。我们表明，考虑到平均场水平的交换差距不足以预测不同拓扑的电子状态之间的相变。干扰磁化的热自旋波动可以充当强烈散射电子的冷冻疾病，即使在没有结构杂质的情况下，也可以显着降低量化运输的开始温度。迄今已忽略的这种效果，对固有磁性绝缘体的最新实验提供了另一种解释。
In magnetic topological insulators, quantized electronic transport is interwined with spontaneous magnetic ordering, as magnetization controls band gaps, hence band topology, through the exchange interaction. We show that considering the exchange gaps at the mean-field level is inadequate to predict phase transitions between electronic states of distinct topology. Thermal spin fluctuations disturbing the magnetization can act as frozen disorders that strongly scatter electrons, reducing the onset temperature of quantized transport appreciably even in the absence of structural impurities. This effect, which has hitherto been overlooked, provides an alternative explanation of recent experiments on intrinsic magnetic topological insulators.
