Phase changings in the surface layers of Td-WTe_(2) driven by alkali-metal deposition

作     者：Yu Zhu Zheng-Guo Wang Yu-Jing Ren Peng-Hao Yuan Jing-Zhi Chen Yi Ou Li-Li Meng Yan Zhang 朱玉;王政国;任宇靖;袁鹏浩;陈景芝;欧仪;孟丽丽;张焱

作者机构：International Center for Quantum MaterialsSchool of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum MatterBeijing 100871China 

出 版 物：《Chinese Physics B》 (中国物理B(英文版))

年 卷 期：2025年第34卷第1期

页      面：172-178页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2022YFA1403502) the National Natural Science Foundation of China(Grant No.11888101) 

主　　题：angle-resolved photoemission spectroscopy transition metal dichalcogenides phase transition 

摘      要：The discovery of phase changings in two-dimensional(2D)materials driven by external stimuli not only helps to understand the various intriguing phases in 2D materials but also provides directions for constructing new functional ***,by combining angle-resolved photoemission spectroscopy(ARPES)and in-situ alkali-metal deposition,we studied how alkali-metal adatoms affect the electronic structure of T_(d)-WTe_(2)on two different cleaved *** found that depending on the polarization direction of the cleaved surface,the alkali-metal deposition triggered two successive phase transitions on one surface of WTe_(2),while on the other surface,no phase transition was *** attributed the observed phase transitions to a Td↑-1T′-Td↓structural transition driven by an alkali-metal induced sliding of *** comparing the band structure obtained in different structural phases of WTe_(2),we found that the evolution of band structure across different phases is characterized by an energy scale that could be related to the degree of orbital hybridization between two adjacent WTe_(2)*** results demonstrate a method that manipulates the surface structure of bulk 2D *** also builds a direct correlation between the electronic structure and the degree of interlayer misalignment in this intriguing 2D material.