Doping-Dependent and Orbital-Dependent Band Renormalization in Ba(Fe1-xCox)2As2 Superconductors
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概要
- 論文の詳細を見る
Angle resolved photoemission spectroscopy of Ba(Fe1-xCox)2As2 (x = 0.06, 0.14, and 0.24) shows that the width of the Fe 3d_{yz/zx} hole band depends on the doping level. In contrast, the Fe 3d_{x^{2}-y^{2}} and 3z^{2}-r^{2} bands are rigid and shifted by the Co doping. The Fe 3d_{yz/zx} hole band is flattened at the optimal doping level x = 0.06, indicating that the band renormalization of the Fe 3d_{yz/zx} band correlates with the enhancement of the superconducting transition temperature. The orbital-dependent and doping-dependent band renormalization indicates that the fluctuations responsible for the superconductivity is deeply related to the Fe 3d orbital degeneracy.
- 2011-11-15
著者
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Mizokawa Takashi
Department Of Complexity Science And Engineering And Department Of Physics University Of Tokyo
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Sudayama Takaaki
Department Of Physics And Department Of Complexity Science And Engineering University Of Tokyo
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Taniguchi Masaki
Hiroshima Synchrotron Radiation Center Hiroshima University
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Sato Taku
Institute For Solid State Physics The University Of Tokyo
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Saini Naurang
Department of Physics, Universitá di Roma ``La Sapienza'', Piazalle Aldo Moro 2, 00185 Roma, Italy
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Namatame Hirofumi
Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima, Hiroshima 739-0046, Japan
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Wakisaka Yuki
Department of Complexity Science and Engineering, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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Namatame Hirofumi
Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashihiroshima, Hiroshima 739-0046, Japan
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Arita Masashi
Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashihiroshima, Hiroshima 739-0046, Japan
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Ibuka Soshi
Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
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Morinaga Rei
Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
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