XAuBi(X=Eu, Ba)拓扑nodal chain半金属的第一性原理研究

论文摘要

由于在磁性材料体系中缺失时间反演对称性,导致nodal chain被破坏,所以nodal chain通常存在于非磁材料中.但是,磁性材料EuAuBi与常规磁性材料不同.本工作以第一性原理计算为研究方法,预言了在不考虑自旋轨道相互作用时,磁性材料EuAuBi体系为新型拓扑nodal chain半金属;当考虑自旋轨道耦合时,EuAuBi会退化为外尔半金属.对于非磁材料BaAuBi来说,在不考虑自旋轨道相互作用时,它同样是一种拓扑nodal chain半金属;当考虑自旋轨道相互作用时,由于C3旋转对称性的存在,BaAuBi会退化为狄拉克半金属.在XAuBi （X=Eu, Ba）中发现nodal chain半金属,会促进对六角材料的拓扑性质研究以及开拓其新实际应用领域.

论文目录

文章来源

类型: 期刊论文

作者: 田心,王广涛

关键词: 拓扑半金属,反铁磁

来源: 低温物理学报 2019年03期

年度: 2019

分类: 基础科学

专业: 物理学

单位: 河南师范大学物理与材料科学学院

基金: 河南省自然科学基金(编号182300410176),河南师范大学高性能计算中心(HPC)资助的课题

分类号: O469

DOI: 10.13380/j.ltpl.2019.03.010

页码: 213-217

总页数: 5

文件大小: 878K

下载量: 29

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