Theoretical Study on Superconductivity in Boron-Doped Diamond(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We consider superconductivity in boron (B) doped diamond using a simplified model for the valence band of diamond. We treat the effects of substitutional disorder of B ions by the coherent potential approximation (CPA) and those of the attractive force between holes by the ladder approximation under the assumption of instantaneous interaction with the Debye cutoff. We thereby calculate the quasiparticle life time, the evolution of the single-particle spectra due to doping, and the effect of disorder on the superconducting critical temperature T_c. We in particular compare our results with those for supercell calculations to see the role of disorder, which turns out to be of crucial importance to T_c.
- 2007-01-15
著者
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Fujiwara H
Department Of Chemistry Graduate School Of Science Osaka Prefecture University And Crest Jst
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Fukuyama Hidetoshi
Department Of Chemistry Graduate School Of Science Osaka Prefecture University And Crest Jst
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Fujiwara Hideki
Department Of Organic And Polymeric Materials Faculty Of Engineering Tokyo Institute Of Technology
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Ohta Yukinori
Graduate School Of Science And Technology Chiba University:department Of Physics Chiba University
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Fukuyama Hidetoshi
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Fukuyama Hidetoshi
Department Of Chemistry Graduate School Of Science Osaka Prefecture University
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Horiuchi Satoshi
Graduate School Of Psychology Kurume University
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Horiuchi Satoshi
Graduate School Of Science And Technology Chiba University
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Shirakawa Tomonori
Graduate School Of Science And Technology Chiba University
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Ohta Yukinori
Graduate School of Science and Technology, Chiba University:Department of Physics, Chiba University
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Fukuyama Hidetoshi
Department of Applied Physics and Research Institute for Science and Technology, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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