Spectroscopic evidence for the realization of a genuine topological nodal-line semimetal in LaSbTe
Wang Yang, Yuting Qian, Meng Yang, Hongxiang Chen, Cong Li, Zhiyun Tan, Yongqing Cai, Wenjuan Zhao, Shunye Gao, Ya Feng, Shiv Kumar, Eike F. Schwier, Lin Zhao, Hongming Weng, Youguo Shi, Gang Wang, Youting Song, Yaobo Huang, K. Shimada, Zuyan Xu, Xingjiang Zhou, Guodong Liu
Abstract
Numerous nodal-line semimetal candidates have been predicted and experimentally examined. To realize a genuine nodal-line semimetal, the Dirac nodes must be robust against spin-orbit coupling and must lie close to the Fermi level so as to allow for the manifestation of the novel properties. By performing band structure calculations and angle-resolved photoemission measurements, direct evidence is provided here for the realization of a genuine nodal-line semimetal in LaSbTe. This finding creates new opportunity for exploring novel phenomena in topological materials.