Distinct behavior of electronic structure under uniaxial strain in BaFe2As2

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外文摘要：We report a study of the electronic structure of BaFe2As2 under uniaxial strains using angle-resolved photoemission spectroscopy and transport measurements.Two electron bands at the My point,with an energy splitting of 50 meV in the strain-free sample,shift downward and merge into each other under a large uniaxial strain,while three hole bands at theΓ point shift downward together.However,we also observed an enhancement of the resistance anisotropy under uniaxial strains by electrical transport measurements,implying that the applied strains strengthen the electronic nematic order in BaFe2As2.These observations suggest that the splitting of these two electron bands at the My point is not caused by the nematic order in BaFe2As2.

外文关键词：

iron-based superconductorangle-resolved photoelectron spectroscopyuniaxial strainsymmetry breaking

作者：

李佳俊、Giao Ngoc Phan、王兴玉、杨发枝、胡全欣、贾可、赵金、刘文尧、张任杰、石友国、李世亮、钱天、丁洪

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作者单位：

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

School of Physics,University of Chinese Academy of Sciences,Beijing 100190,China

CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China

Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

Songshan Lake Materials Laboratory,Dongguan 523808,China

Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 201210,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChinese Academy of SciencesChinese Academy of SciencesChinese Academy of SciencesK.C.Wong Education FoundationInformatization Plan of Chinese Academy of Sciences

项目编号：

11888101U1832202QYZDB-SSW-SLH043XDB28000000XDB33000000GJTD-2018-01CAS-WX2021SF-0102

出版年：

2024

DOI：

10.1088/1674-1056/acd8af

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

年,卷(期)：2024.33(1)

参考文献量25