Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials  

作　　者：Qian Wang Da-Wei Wu Guang-Hua Guo Meng-Qiu Long Yun-Peng Wang 王乾;邬大为;郭光华;龙孟秋;王云鹏(School of Physics,Central South University,Changsha 410083,China)

机构地区：[1]School of Physics,Central South University,Changsha 410083,China

出　　处：《Chinese Physics B》2024年第9期194-198,共5页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.12004439);Hunan Province Postgraduate Research and Innovation Project(Grant No.CX20230229);the computational resources from the High Performance Computing Center of Central South University.

摘　　要：Unconventional antiferromagnetism dubbed as altermagnetism was first discovered in rutile structured magnets,which is featured by spin splitting even without the spin–orbital coupling effect.This interesting phenomenon has been discovered in more altermagnetic materials.In this work,we explore two-dimensional altermagnetic materials by studying two series of two-dimensional magnets,including MF4 with M covering all 3d and 4d transition metal elements,as well as TS2 with T=V,Cr,Mn,Fe.Through the magnetic symmetry operation of RuF4 and MnS2,it is verified that breaking the time inversion is a necessary condition for spin splitting.Based on symmetry analysis and first-principles calculations,we find that the electronic bands and magnon dispersion experience alternating spin splitting along the same path.This work paves the way for exploring altermagnetism in two-dimensional materials.

关 键 词：two-dimensional altermagnetic materials altermagnetism spin splitting first-principles calculations 

分 类 号：O469[理学—凝聚态物理]