Room temperature quantum anomalous Hall insulator in honeycomb lattice, RuCS_(3), with large magnetic anisotropy energy  

作　　者：赵永春 朱铭鑫 李胜世 李萍 Yong-Chun Zhao;Ming-Xin Zhu;Sheng-Shi Li;Ping Li(School of Physics and Technology,University of Jinan,Jinan 250022,China;Institute of Spintronics,University of Jinan,Jinan 250022,China)

机构地区：[1]School of Physics and Technology,University of Jinan,Jinan 250022,China [2]Institute of Spintronics,University of Jinan,Jinan 250022,China

出　　处：《Chinese Physics B》2023年第5期604-609,共6页中国物理B（英文版）

基　　金：the Natural Science Foundation of Shandong Province, China (Grant No. ZR2019MA041);the Taishan Scholar Project of Shandong Province, China (Grant No. ts20190939);the National Natural Science Foundation of China (Grant No. 62071200);the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2020QA052)。

摘　　要：The quantum anomalous Hall(QAH) effect has attracted enormous attention since it can induce topologically protected conducting edge states in an intrinsic insulating material. For practical quantum applications, the main obstacle is the non-existent room temperature QAH systems, especially with both large topological band gap and robust ferromagnetic order. Here, according to first-principles calculations, we predict the realization of the room temperature QAH effect in a two-dimensional(2D) honeycomb lattice, RuCS_(3) with a non-zero Chern number of C = 1. Especially, the nontrivial topology band gap reaches up to 336 me V for RuCS_(3). Moreover, we find that RuCS_(3) has a large magnetic anisotropy energy(2.065 me V) and high Curie temperature(696 K). We further find that the non-trivial topological properties are robust against the biaxial strain. The robust topological and magnetic properties make RuCS_(3) have great applications in room temperature spintronics and nanoelectronics.

关 键 词：quantum anomalous Hall(QAH)effect room temperature magnetic anisotropy energy topological properties first-principles calculations 

分 类 号：O469[理学—凝聚态物理]