Surface-sensitive electronic structure of kagome superconductor CsV_(3)Sb_(5)  

作　　者：Zhisheng Zhao Jianghao Yao Rui Xu Yuzhe Wang Sen Liao Zhengtai Liu Dawei Shen Shengtao Cui Zhe Sun Yilin Wang Donglai Feng Juan Jiang 赵志生;姚江浩;徐瑞;王禹喆;廖森;刘正太;沈大伟;崔胜涛;孙喆;王义林;封东来;姜娟(School of Emerging Technology and Department of Physics,University of Science and Technology of China,Hefei 230026,China;Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;National Synchrotron Radiation Laboratory School of Nuclear Science and Technology,and New Cornerstone Science Laboratory,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]School of Emerging Technology and Department of Physics,University of Science and Technology of China,Hefei 230026,China [2]Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China [3]National Synchrotron Radiation Laboratory School of Nuclear Science and Technology,and New Cornerstone Science Laboratory,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Physics B》2024年第10期35-40,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12174362 and 92065202);the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302803);the New Cornerstone Science Foundation.Part of this research used Beamline 03U of the Shanghai Synchrotron Radiation Facility,which is supported by ME2 project under contract No.11227902 from the National Natural Science Foundation of China.

摘　　要：We systematically study the electronic structure of a kagome superconductor CsV_(3)Sb_(5)at different temperatures coveringboth its charge density wave state and normal state with angle-resolved photoemission spectroscopy.We observe thatthe V-shaped band aroundГshows three different behaviors,referred to as a/a',βandγ,mainly at different temperatures.Detailed investigations confirm that these bands are all from the same bulk Sb-p_(z)origin,but they are quite sensitiveto the sample surface conditions mainly modulated by temperature.Thus,the intriguing temperature dependent electronicbehavior of the band nearГis affected by the sample surface condition,rather than intrinsic electronic behavior originatingfrom the phase transition.Our result systematically reveals the confusing electronic structure behavior of the energy bandsaroundГ,facilitating further exploration of the novel properties in this material.

关 键 词：KAGOME ARPES charge density wave surface sensitive 

分 类 号：O511.3[一般工业技术—材料科学与工程]