单层
量子反常霍尔效应
凝聚态物理
自旋电子学
磁化
自旋(空气动力学)
钙钛矿(结构)
量子自旋霍尔效应
卤化物
量子霍尔效应
联轴节(管道)
带隙
Dirac(视频压缩格式)
物理
材料科学
化学
铁磁性
结晶学
纳米技术
电子
量子力学
无机化学
磁场
中微子
冶金
热力学
作者
Zeyu Li,Yulei Han,Zhenhua Qiao
出处
期刊:Physical review
日期:2021-11-01
卷期号:104 (20)
被引量:2
标识
DOI:10.1103/physrevb.104.205401
摘要
We theoretically propose a family of structurally stable monolayer halide perovskite A$_3$B$_2$C$_9$ (A=Rb, Cs; B=Pd, Pt; C=Cl, Br) with easy magnetization planes. These materials are all half-metals with large spin gaps over 1~eV accompanying with a single spin Dirac point located at K point. When the spin-orbit coupling is switched on, we further show that Rb$_3$Pt$_2$Cl$_9$, Cs$_3$Pd$_2$Cl$_9$, and Cs$_3$Pt$_2$Cl$_9$ monolayers can open up large band gaps from 63 to 103 meV to harbor quantum anomalous Hall effect with Chern numbers of $\mathcal{C}=\pm1$, whenever the mirror symmetry is broken by the in-plane magnetization. The corresponding Berezinskii-Kosterlitz-Thouless transition temperatures are over 248~K. Our findings provide a potentially realizable platform to explore quantum anomalous Hall effect and spintronics at high temperatures.
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