拓扑绝缘体
物理
轴子
凝聚态物理
磁场
拓扑(电路)
磁矩
反铁磁性
量子力学
数学
粒子物理学
组合数学
暗物质
作者
Yang Zhang,Ke Deng,Xiao Zhang,Meng Wang,Yuan Wang,Cai Liu,Jia-Wei Mei,Shiv Kumar,Eike F. Schwier,Kenya Shimada,Chao‐Yu Chen,Bing Shen
出处
期刊:Physical review
日期:2020-05-18
卷期号:101 (20)
被引量:48
标识
DOI:10.1103/physrevb.101.205126
摘要
Topological insulator with antiferromagnetic order can serve as an ideal platform for the realization of axion electrodynamics. In this paper, we report a systematic study of the axion topological insulator candidate EuIn$_2$As$_2$. A linear energy dispersion across the Fermi level confirms the existence of the proposed hole-type Fermi pocket. Spin-flop transitions occur with magnetic fields applied within the $ab$-plane while are absent for fields parallel to the $c$-axis. Anisotropic magnetic phase diagrams are observed and the orientation of the ground magnetic moment is found to be within the $ab$-plane. The magnetoresistivity for EuIn$_2$As$_2$ behaves non-monotonic as a function of field strength. It exhibits angular dependent evolving due to field-driven and temperature-driven magnetic states. These results indicate that the magnetic states of EuIn$_2$As$_2$ strongly affect the transport properties as well as the topological nature.
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