论文标题
抗铁磁拓扑绝缘子MNBI $ _2 $ TE $ _4 $的热电和热电特性
Thermal and thermoelectric properties of an antiferromagnetic topological insulator MnBi$_2$Te$_4$
论文作者
论文摘要
在MNBI $ _2 $ TE $ _4 $中发现了内在的抗磁性拓扑绝缘子（AFM-TI）引起了强烈的关注，其中大部分都在于其电气性能。在本文中，我们报告了该新发现的AFM-TI的电子，热和热电运输研究。其电阻率，导热率和塞贝克系数的温度和磁场依赖性表明该系统中的电荷，晶格和自旋度之间的强烈耦合。此外，mnbi $ _2 $ te $ _4 $表现出一个大的异常Nernst信号，该信号与现场诱导的抗抗抗铁磁状态的非零浆果曲率有关。
The discovery of an intrinsic antiferromagnetic topological insulator (AFM-TI) in MnBi$_2$Te$_4$ has attracted intense attention, most of which lies on its electrical properties. In this paper, we report electronic, thermal, and thermoelectric transport studies of this newly found AFM-TI. The temperature and magnetic field dependence of its resistivity, thermal conductivity, and Seebeck coefficient indicate strong coupling between charge, lattice, and spin degrees of freedom in this system. Furthermore, MnBi$_2$Te$_4$ exhibits a large anomalous Nernst signal, which is associated with non-zero Berry curvature of the field-induced canted antiferromagnetic state.
