Surface-sensitive electronic structure of kagome superconductor CsV3Sb5

赵志生 ¹姚江浩 ¹徐瑞 ¹王禹喆 ¹廖森 ¹刘正太 ²沈大伟 ³崔胜涛 ³孙喆 ³王义林 ¹封东来 ⁴姜娟¹

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作者信息

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
4. School of Emerging Technology and Department of Physics,University of Science and Technology of China,Hefei 230026,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
折叠

Abstract

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.

Key words

kagome/ARPES/charge density wave/surface sensitive

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基金项目

National Natural Science Foundation of China(12174362)

National Natural Science Foundation of China(92065202)

Innovation Program for Quantum Science and Technology(2021ZD0302803)

New Cornerstone science Foundation(11227902)

National Natural Science Foundation of China()

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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