论文标题
磁性顺序对反铁磁拓扑绝缘子MNBI $ _2 $ TE $ _4 $的影响
Influence of magnetic ordering on the optical response of the antiferromagnetic topological insulator MnBi$_2$Te$_4$
论文作者
论文摘要
分层的拓扑绝缘子MNBI $ _2 $ te $ _4 $最近由于其内在的反铁磁秩序引起了极大的兴趣，可能会托管各种拓扑阶段。根据温度依赖性红外光谱在广泛的频率范围内，我们研究了MNBI $ _2 $ _2 $ te $ _4 $在磁性订购温度下的光学电导率的变化。几个光学参数的温度依赖性揭示了磁相变的异常，这表明散装电子带结构与磁性之间的相关性。我们将发现与有关MNBI $ _2 $ TE $ _4 $的电子带结构温度依赖性的最新报告联系起来。
The layered topological insulator MnBi$_2$Te$_4$ has attracted great interest recently due to its intrinsic antiferromagnetic order, potentially hosting various topological phases. By temperature-dependent infrared spectroscopy over a broad frequency range, we studied the changes in the optical conductivity of MnBi$_2$Te$_4$ at the magnetic ordering temperature. The temperature dependence of several optical parameters reveals an anomaly at the magnetic phase transition, which suggests the correlation between the bulk electronic band structure and the magnetism. We relate our findings to recent reports on the temperature dependence of the electronic band structure of MnBi$_2$Te$_4$.
