Multiple Symmetry-Protected Dirac Nodal Lines in A Quasi-One-Dimensional Semimetal
Abstract
Nodal-line semimetals (NLSMs) contains Dirac/Weyl type band-crossing nodes extending into shapes of line, loop and chain in the reciprocal space, leading to novel band topology and transport responses. Robust NLSMs against spin-orbit coupling typically occur in three-dimensional materials with more symmetry operations to protect the line nodes of band crossing, while the possibilities in lower-dimensional materials are rarely discussed. Here we demonstrate robust NLSM phase in a quasi-one-dimensional nonmagnetic semimetal TaNiTe5. Combining angle-resolved photoemission spectroscopy measurements and first-principles calculations, we reveal how reduced dimension can interact with nonsymmorphic symmetry and result into multiple Dirac-type nodal lines with four-fold degeneracy. Our findings suggest rich physics and application in (quasi-)one-dimensional topological materials and call for further investigation on the interplay between the quantum confinement and nontrivial band topology.
Keywords
Cite
@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}
}
Comments
13 pages, 4 figures