Coexistence of the hourglass and nodal-line dispersions in Nb3SiTe6 revealed by ARPES

iScience

卷:25

Li Song¹  Hongen Zhu²  Yuliang Li²  Zhe Sun²  Sheng Wang²  Shuangming Chen²  Mukhtar Lawan Adam²  Shengtao Cui²  Yunbo Wu²  Yi Liu²  Wen Zhu²  Bo Zhang²  Tongrui Li²  Qilong Cui²  Dengfeng Cao²  Zhanfeng Liu² 

[1] CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China;

[2] National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China;

关键词: Applied sciences;    Materials science;    Nanomaterials;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: The non-symmorphic crystal symmetry protection in the layered topological semimetal Nb3SiTe6 can generate exotic band crossings. Herein, high-quality Nb3SiTe6 single crystal was synthesized via chemical vapor transport. The lattice structure of Nb3SiTe6 was characterized by scanning transmission electron microscopy, X-ray diffraction, core-level photoemission, and Raman spectroscopies. Angle-resolved photoemission spectroscopy was used to reveal its topological properties by presenting band structures along different high-symmetry directions. Our data show that nontrivial band features coexist in Nb3SiTe6, including an hourglass-type dispersion formed by two bands along the S-R high-symmetry line, two node lines along the S-X path and the S-R-U path, respectively. These results provide a context for the understanding and exploration of the exotic topological properties of Nb3SiTe6.

【 授权许可】

Unknown