Charge density wave states in phase-engineered monolayer VTe_(2)  

作　　者：Zhi-Li Zhu Zhong-Liu Liu Xu Wu Xuan-Yi Li Jin-An Shi Chen Liu Guo-Jian Qian Qi Zheng Li Huang Xiao Lin Jia-Ou Wang Hui Chen Wu Zhou Jia-Tao Sun Ye-Liang Wang Hong-Jun Gao 朱知力;刘中流;武旭;李轩熠;时金安;刘晨;钱国健;郑琦;黄立;林晓;王嘉欧;陈辉;周武;孙家涛;王业亮;高鸿钧(Institute of Physics and University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100190,China;MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices,School of Integrated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100084,China)

机构地区：[1]Institute of Physics and University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100190,China [2]MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices,School of Integrated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081,China [3]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100084,China

出　　处：《Chinese Physics B》2022年第7期71-76,共6页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant Nos.2021YFA1400100,2020YFA0308800,and 2019YFA0308000);the National Natural Science Foundation of China(Grant Nos.92163206,62171035,62171035,61901038,61971035,61725107,and 61674171);the Beijing Nova Program from Beijing Municipal Science&Technology Commission(Grant No.Z211100002121072);the Beijing Natural Science Foundation(Grant Nos.Z190006 and 4192054)。

摘　　要：Charge density wave(CDW)strongly affects the electronic properties of two-dimensional(2D)materials and can be tuned by phase engineering.Among 2D transitional metal dichalcogenides(TMDs),VTe_(2)was predicted to require small energy for its phase transition and shows unexpected CDW states in its T-phase.However,the CDW state of H-VTe_(2)has been barely reported.Here,we investigate the CDW states in monolayer(ML)H-VTe_(2),induced by phase-engineering from T-phase VTe_(2).The phase transition between T-and H-VTe_(2)is revealed with x-ray photoelectron spectroscopy(XPS)and scanning transmission electron microscopy(STEM)measurements.For H-VTe_(2),scanning tunneling microscope(STM)and low-energy electron diffraction(LEED)results show a robust 2√3×2√3CDW superlattice with a transition temperature above 450 K.Our findings provide a promising way for manipulating the CDWs in 2D materials and show great potential in its application of nanoelectronics.

关 键 词：charge density wave H-VTe_(2) phase engineering transitional metal dichalcogenides 

分 类 号：O469[理学—凝聚态物理]