Distinct behavior of electronic structure under uniaxial strain in BaFe 2 As 2

We report a study of the electronic structure of BaFe 2 As 2 under uniaxial strains using angle-resolved photoemission spectroscopy and transport measurements. Two electron bands at the M Y point, with an energy splitting of 50 meV in the strain-free sample, shift downward and merge into each other...

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Published in:Chinese physics B 2023-12, Vol.33 (1), p.17401
Main Authors: Li 李, Jiajun 佳俊, Phan, Giao Ngoc, Wang 王, Xingyu 兴玉, Yang 杨, Fazhi 发枝, Hu 胡, Quanxin 全欣, Jia 贾, Ke 可, Zhao 赵, Jin 金, Liu 刘, Wenyao 文尧, Zhang 张, Renjie 任杰, Shi 石, Youguo 友国, Li 李, Shiliang 世亮, Qian 钱, Tian 天, Ding 丁, Hong 洪
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Language:English
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Summary:We report a study of the electronic structure of BaFe 2 As 2 under uniaxial strains using angle-resolved photoemission spectroscopy and transport measurements. Two electron bands at the M Y 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 the Γ 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 BaFe 2 As 2 . These observations suggest that the splitting of these two electron bands at the M Y point is not caused by the nematic order in BaFe 2 As 2 .
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/acd8af