准一维半金属中多重对称保护的狄拉克节线
其他凝聚态物理
2021-10-04 v1
摘要
节线半金属(NLSMs)包含狄拉克/外尔型能带交叉节点，在倒空间中延伸为线、环和链的形状，导致新颖的能带拓扑与输运响应。抗自旋轨道耦合的稳健NLSM通常出现在具有更多对称操作以保护能带交叉线节点的三维材料中，而低维材料中的可能性鲜有讨论。本文在准一维非磁性半金属TaNiTe5中展示了稳健的NLSM相。结合角分辨光电子能谱测量与第一性原理计算，我们揭示了维度降低如何与非滑移对称性相互作用，并产生具有四重简并的多重狄拉克型节线。我们的发现表明(准)一维拓扑材料中存在丰富的物理与应用，并呼吁进一步研究量子限域与非平庸能带拓扑之间的相互作用。
引用
@article{arxiv.2104.02221,
title = {Multiple Symmetry-Protected Dirac Nodal Lines in A Quasi-One-Dimensional Semimetal},
author = {Zhanyang Hao and Weizhao Chen and Yuan Wang and Jiayu Li and Xiao-Ming Ma and Yu-Jie Hao and Ruie Lu and Zecheng Shen and Zhicheng Jiang and Wanling Liu and Qi Jiang and Xiao Lei and Le Wang and Ying Fu and Liang Zhou and Lianglong Huang and Zhengtai Liu and Mao Ye and Dawei Shen and Jiawei Mei and Hongtao He and Cai Liu and Ke Deng and Chang Liu and Qihang Liu and Chaoyu Chen},
journal= {arXiv preprint arXiv:2104.02221},
year = {2021}
}
备注
13 pages, 4 figures