| Pseudogap and Superconducting Gap in SmFeAs（O1-xFx） Superconductor from Photoemission Spectroscopy |
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| 引用本文： | 刘海云,;贾小文,;张文涛,;赵林,;孟建桥,;刘国东,;董晓莉,;吴刚,;刘荣华,;陈仙辉,;任治安,;衣纬,;车广灿,;陈根富,;王楠林,;王桂玲,;周勇,;朱镛,;王晓阳,;赵忠贤,;许祖彦,;陈创天,;周兴江.Pseudogap and Superconducting Gap in SmFeAs（O1-xFx） Superconductor from Photoemission Spectroscopy[J].中国物理快报,2008,25(10):3761-3764. |
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| 作者姓名： | 刘海云 ;贾小文 ;张文涛 ;赵林 ;孟建桥 ;刘国东 ;董晓莉 ;吴刚 ;刘荣华 ;陈仙辉 ;任治安 ;衣纬 ;车广灿 ;陈根富 ;王楠林 ;王桂玲 ;周勇 ;朱镛 ;王晓阳 ;赵忠贤 ;许祖彦 ;陈创天 ;周兴江 |
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| 作者单位： | [1]National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190; [2]Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026; [3]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190; [4]Key Laboratory for Optics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190; [5]Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 |
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| 基金项目： | Supported by the National Natural Science Foundation of China, the National Basic Research Programme of China under Grant Nos 2006CB601002 and 2006CB921302, and the ITSNEM Project Chinese Academy of Sciences. |
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| 摘 要： | High resolution photoemission measurements are carried out on non-superconducting SmOFeAs paxent compound and superconducting SmFeAs（O1-xFx） （x = 0.12, and 0.15） compounds. The momentum-integrated spectra exhibit a clear Fermi cutoff that shows little leading-edge shift in the superconducting state. A robust feature at 13 meV is identified in all these samples. Spectral weight suppression near IF, F with decreasing temperature is observed in both undoped and doped samples that points to a possible existence of a pseudogap in these Fe-based compounds.
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| 关 键 词： | 超导体 光电效应光谱学 超导间隙 SmFeAs(O1-xFx) |
| 收稿时间： | 2008-8-26 |
Pseudogap and Superconducting Gap in SmFeAs(O1-xFx) Superconductor from Photoemission Spectroscopy |
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| Hai-Yun,JIA Xiao-Wen,ZHANG Wen-Tao,ZHAO Lin,MENG Jian-Qiao,LIU Guo-Dong,DONG Xiao-Li,WU Gang,LIU Rong-Hua,CHEN Xian-Hui,REN Zhi-An,YI Wei,CHE Guang-Can,CHEN Gen-Fu,WANG Nan-Lin,WANG Gui-Ling,ZHOU Yong,ZHU Yong,WANG Xiao-Yang,ZHAO Zhong-Xian,XU Zu-Yan,CHEN Chuang-Tian,ZHOU Xing-Jiang.Pseudogap and Superconducting Gap in SmFeAs(O1-xFx) Superconductor from Photoemission Spectroscopy[J].Chinese Physics Letters,2008,25(10):3761-3764. |
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| Authors: | Hai-Yun JIA Xiao-Wen ZHANG Wen-Tao ZHAO Lin MENG Jian-Qiao LIU Guo-Dong DONG Xiao-Li WU Gang LIU Rong-Hua CHEN Xian-Hui REN Zhi-An YI Wei CHE Guang-Can CHEN Gen-Fu WANG Nan-Lin WANG Gui-Ling ZHOU Yong ZHU Yong WANG Xiao-Yang ZHAO Zhong-Xian XU Zu-Yan CHEN Chuang-Tian ZHOU Xing-Jiang |
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| Institution: | LIU Hai-Yun, JIA Xiao-Wen, ZHANG Wen-Tao, ZHAO Lin, MENG Jian-Qiao, LIU Guo-Dong, DONG Xiao-Li, WU Gang, LIU Rong-Hua, CHEN Xian-Hui, REN Zhi-An, YI Wei, CUE Guang-Can, CHEN Gen-Fu, WANG Nan-Lin, WANG Gui-Ling, ZHOU Yong, ZHU Yong, WANG Xiao-Yang, ZHAO Zhong-Xian, XU Zu-Yan, CHEN Chuang-Tian, ZHOU Xing-Jiang( National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 ; Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026 ;Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 ;Key Laboratory for Optics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 ; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190) |
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| Abstract: | High resolution photoemission measurements are carried out on non-superconducting SmOFeAs parent compound and superconducting SmFeAs(O1-xFx) (x=0.12, and 0.15) compounds. The momentum-integrated spectra exhibit a clear Fermi cutoff that shows little leading-edge shift in the superconducting state. A robust feature at 13meV is identified in all these samples. Spectral weight suppression near EF with decreasing temperature is observed in both undoped and doped samples that points to a possible existence of a pseudogap in these Fe-based compounds. |
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| Keywords: | 74 70 -b 74 25 Jb 79 60 -i 71 20 -b |
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