首页|Surface-sensitive electronic structure of kagome superconductor CsV3Sb5
Surface-sensitive electronic structure of kagome superconductor CsV3Sb5
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We systematically study the electronic structure of a kagome superconductor CsV3Sb5 at different temperatures cov-ering both its charge density wave state and normal state with angle-resolved photoemission spectroscopy.We observe that the V-shaped band around(-Γ)shows three different behaviors,referred to as α/α',β and γ,mainly at different tempera-tures.Detailed investigations confirm that these bands are all from the same bulk Sb-pz origin,but they are quite sensitive to the sample surface conditions mainly modulated by temperature.Thus,the intriguing temperature dependent electronic behavior of the band near(-Γ)is affected by the sample surface condition,rather than intrinsic electronic behavior originating from the phase transition.Our result systematically reveals the confusing electronic structure behavior of the energy bands around(-Γ),facilitating further exploration of the novel properties in this material.
kagomeARPEScharge density wavesurface sensitive
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
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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
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInnovation Program for Quantum Science and TechnologyNew Cornerstone science FoundationNational Natural Science Foundation of China
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