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Common Features in Electronic Structure of the Oxypnictide Superconductors from Photoemission Spectroscopy |
| JIA Xiao-Wen1, LIU Hai-Yun1, ZHANG Wen-Tao1, ZHAO Lin1, MENG Jian-Qiao1, LIU Guo-Dong1, DONG Xiao-Li1, WU Gang2, LIU Rong-Hua2, CHEN Xian-Hui2, REN Zhi-An1, YI Wei1, CHE Guang-Can1, CHEN Gen-Fu3, WANG Nan-Lin3, WANG Gui-Ling4, ZHOU Yong4, ZHU Yong5, WANG Xiao-Yang5, ZHAO Zhong-Xian1, XU Zu-Yan4, CHEN Chuang-Tian5, ZHOU Xing-Jiang1 |
| 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001902Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 2300263Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 1001904Key Laboratory for Optics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001905Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 |
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| Cite this article: |
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JIA Xiao-Wen, LIU Hai-Yun, ZHANG Wen-Tao et al 2008 Chin. Phys. Lett. 25 3765-3768 |
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Abstract High resolution photoemission measurements are carried out on non-superconducting LaFeAsO parent compound and various superconducting RFeAs(O1-xFx) (R=La, Ce and Pr) compounds. It is found that the parent LaFeAsO compound shows a metallic character. By extensive measurements, several common features are identified in the electronic structure of these Fe-based compounds: (1) 0.2eV feature in the valence band, (2) a universal 13--16meV feature, (3) near EF spectral weight suppression with decreasing temperature. These universal features can provide important information about band structure, superconducting gap and pseudogap in these Fe-based materials.
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| Keywords:
74.70.-b
74.25.Jb
79.60.-i
71.20.-b
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Received: 26 August 2008
Published: 26 September 2008
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| PACS: |
74.70.-b
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(Superconducting materials other than cuprates)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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79.60.-i
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(Photoemission and photoelectron spectra)
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71.20.-b
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(Electron density of states and band structure of crystalline solids)
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