文献类型：期刊文献

英文题名：Intrinsic topology of various nodal rings in planar honeycomb lattices

作者：Xu, Wei[1,2];Xue, Yang[3];Zhao, Bao[4];Li, Zhijian[1,2];Yang, Zhongqin[1,2,5]

机构：[1]Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China;[2]Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China;[3]East China Univ Sci & Technol, Sch Sci, Shanghai 200237, Peoples R China;[4]Liaocheng Univ, Sch Phys Sci & Informat Technol, Shandong Key Lab Opt Commun Sci & Technol, Liaocheng 252059, Peoples R China;[5]Shanghai Qi Zhi Inst, Shanghai 200030, Peoples R China

年份：2024

卷号：110

期号：3

外文期刊名：PHYSICAL REVIEW B

收录：;EI(收录号：20243416918905);WOS:【SCI-EXPANDED(收录号:WOS:001270686300003)】；

基金：This work was supported by the National Natural Science Foundation of China under Grants No. 12174059, No. 11874117, No. 11904101, and No. 11604134, and the Natural Science Foundation of Shanghai under Grant No. 21ZR1408200. The calculations were performed at the High Performance Computational Center (HPCC) of the Department of Physics at Fudan University.

语种：英文

外文关键词：Crystal lattices - Honeycomb structures - Orbital calculations - Spin orbit coupling

摘要：A universal topology is predicted for nodal-ring bands formed in planar honeycomb lattices through tightbinding models and topological quantum chemistry theories. In planar honeycomb lattices with s and p orbitals, various nodal-ring bands can occur due to the in-plane mirror symmetry. The band gaps of the nodal rings, opened by spin-orbit coupling, are all found being in quantum spin Hall insulating or topological crystalline insulating states. Two types of the intrinsic topologic states are observed in thallene with first-principles calculations, which has been fabricated in experiments. Our findings provide new routes to generate topologically nontrivial states in honeycomb lattices.