School of Physics and Electronics;
Central South University;
Changsha 410083;
China;
National Synchrotron Radiation Laboratory;
University of Science and Technology of China;
Hefei 230029;
China;
Department of Physics and Electronic Science;
Hunan University of Science and Technology;
Xiangtan 411201;
China;
Beijing Academy of Quantum Information Sciences;
Beijing 100085;
China;
charge density wave; electron-boson coupling; angle-resolved photoemission spectroscopy; electronic structure; Chalcogenide;