摘要
By using scanning tunneling microscopy,we investigated the electronic evolution of T_(d)-WTe_(2) via in-situ surface alkali K atoms deposition.The T_(d)-WTe_(2) surface is electron doped upon K deposition,and as the K coverage increases,two gaps are sequentially opened near Fermi energy,which probably indicates that two phase transitions concomitantly occur during electron doping.The two gaps both show a dome-like dependence on the K coverage.While the bigger gap shows no prominent dependence on the magnetic field,the smaller one can be well suppressed and thus possibly corresponds to the superconducting transition.This work indicates that T_(d)-WTe_(2) exhibits rich quantum states closely related to the carrier concentration.
作者
Qi-Yuan Li
Yang-Yang Lv
Yong-Jie Xu
Li Zhu
Wei-Min Zhao
Yanbin Chen
Shao-Chun Li
李启远;吕洋洋;徐永杰;朱立;赵伟民;陈延彬;李绍春(National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China;School of Physics,Nanjing University,Nanjing 210093,China;Department of Materials Science and Engineering,Nanjing University,Nanjing 210093,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China;Jiangsu Provincial Key Laboratory for Nanotechnology,Nanjing University,Nanjing 210093,China)
基金
financially supported by the National Natural Science Foundation of China(Grants Nos.11790311,92165205,51902152,11874210,and 11774149)
the National Key R&D Program of China(Grants No.2021YFA1400403)。
