Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO_3 Films Revealed by Angle-Resolved Photoemission Spectroscopy
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De-Fa Liu,
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Lin Zhao,
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Shao-Long He,
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Yong Hu,
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Bing Shen,
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Jian-Wei Huang,
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Ai-Ji Liang,
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Yu Xu,
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Xu Liu,
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Jun-Feng He,
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Dai-Xiang Mou,
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Shan-Yu Liu,
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Hai-Yun Liu,
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Guo-Dong Liu,
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Wen-Hao Zhang,
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Fang-Sen Li,
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Xu-Cun Ma,
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Qi-Kun Xue,
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Xian-Hui Chen,
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Gen-Fu Chen,
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Li Yu,
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Jun Zhang,
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Zu-Yan Xu,
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Chuang-Tian Chen,
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Xing-Jiang Zhou
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Abstract
We report comprehensive angle-resolved photoemission investigations on the electronic structures and nematicity of the parent compounds of the iron-based superconductors including CeFeAsO, BaFe_2As_2, NaFeAs, FeSe and undoped FeSe/SrTiO_3 films with 1, 2 and 20 layers. While the electronic structure near the Brillouin zone center \it \Gamma varies dramatically among different materials, the electronic structure near the Brillouin zone corners (M points), as well as their temperature dependence, are rather similar. The electronic structure near the zone corners is dominated by the electronic nematicity that gives rise to a band splitting of the d_xz and d_yz bands below the nematic transition temperature. A clear relation is observed between the band splitting magnitude and the onset temperature of nematicity. Our results may shed light on the origin of nematicity, its effect on the electronic structures, and its relation with superconductivity in the iron-based superconductors.
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Cite this article:
De-Fa Liu, Lin Zhao, Shao-Long He, Yong Hu, Bing Shen, Jian-Wei Huang, Ai-Ji Liang, Yu Xu, Xu Liu, Jun-Feng He, Dai-Xiang Mou, Shan-Yu Liu, Hai-Yun Liu, Guo-Dong Liu, Wen-Hao Zhang, Fang-Sen Li, Xu-Cun Ma, Qi-Kun Xue, Xian-Hui Chen, Gen-Fu Chen, Li Yu, Jun Zhang, Zu-Yan Xu, Chuang-Tian Chen, Xing-Jiang Zhou. Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO$_3$ Films Revealed by Angle-Resolved Photoemission Spectroscopy[J].
Chin. Phys. Lett., 2016, 33(7): 077402.
DOI: 10.1088/0256-307X/33/7/077402
De-Fa Liu, Lin Zhao, Shao-Long He, Yong Hu, Bing Shen, Jian-Wei Huang, Ai-Ji Liang, Yu Xu, Xu Liu, Jun-Feng He, Dai-Xiang Mou, Shan-Yu Liu, Hai-Yun Liu, Guo-Dong Liu, Wen-Hao Zhang, Fang-Sen Li, Xu-Cun Ma, Qi-Kun Xue, Xian-Hui Chen, Gen-Fu Chen, Li Yu, Jun Zhang, Zu-Yan Xu, Chuang-Tian Chen, Xing-Jiang Zhou. Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO$_3$ Films Revealed by Angle-Resolved Photoemission Spectroscopy[J]. Chin. Phys. Lett., 2016, 33(7): 077402. DOI: 10.1088/0256-307X/33/7/077402
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De-Fa Liu, Lin Zhao, Shao-Long He, Yong Hu, Bing Shen, Jian-Wei Huang, Ai-Ji Liang, Yu Xu, Xu Liu, Jun-Feng He, Dai-Xiang Mou, Shan-Yu Liu, Hai-Yun Liu, Guo-Dong Liu, Wen-Hao Zhang, Fang-Sen Li, Xu-Cun Ma, Qi-Kun Xue, Xian-Hui Chen, Gen-Fu Chen, Li Yu, Jun Zhang, Zu-Yan Xu, Chuang-Tian Chen, Xing-Jiang Zhou. Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO$_3$ Films Revealed by Angle-Resolved Photoemission Spectroscopy[J]. Chin. Phys. Lett., 2016, 33(7): 077402. DOI: 10.1088/0256-307X/33/7/077402
De-Fa Liu, Lin Zhao, Shao-Long He, Yong Hu, Bing Shen, Jian-Wei Huang, Ai-Ji Liang, Yu Xu, Xu Liu, Jun-Feng He, Dai-Xiang Mou, Shan-Yu Liu, Hai-Yun Liu, Guo-Dong Liu, Wen-Hao Zhang, Fang-Sen Li, Xu-Cun Ma, Qi-Kun Xue, Xian-Hui Chen, Gen-Fu Chen, Li Yu, Jun Zhang, Zu-Yan Xu, Chuang-Tian Chen, Xing-Jiang Zhou. Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO$_3$ Films Revealed by Angle-Resolved Photoemission Spectroscopy[J]. Chin. Phys. Lett., 2016, 33(7): 077402. DOI: 10.1088/0256-307X/33/7/077402
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