Topological Magnons in Kitaev Magnets with Finite Dzyaloshinskii–Moriya Interaction at High Field

作     者：厉康康 Kangkang Li

作者机构：Department of PhysicsZhejiang Normal UniversityJinhua 321004China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2023年第40卷第2期

页      面：55-59页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0701[理学-数学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.12104407) the Natural Science Foundation of Zhejiang Province(Grant No.LQ20A040004) 

主　　题：interaction field topological 

摘      要：There have been intensive studies on Kitaev materials for the sake of realization of exotic states such as quantum spin liquid and topological *** realistic materials,the Kitaev interaction may coexist with the Dzyaloshinskii–Moriya interaction,and it is of challenge to distinguish their magnitudes ***,we study the topological magnon excitations and related thermal Hall conductivity of kagome magnet exhibiting Heisenberg,Kitaev and Dzyaloshinskii–Moriya interactions exposed to a magnetic *** a strong magnetic field perpendicular to the plane of the lattice([111]direction)that brings the system into a fully polarized paramagnetic phase,we find that the magnon bands carry nontrivial Chern numbers in the full region of the phase ***,there are phase transitions related to two topological phases with opposite Chern numbers,which lead to the sign changes of the thermal Hall *** the phase with negative thermal conductivity,the Kitaev interaction is relatively large and the width of the phase increases with the strength of Dzyaloshinskii–Moriya ***,the present study will contribute to the understanding of related compounds.