Triplet Pairing Superconductivity Induced by Short-Range Ferromagnetic Correlations in Sr_2RuO_4(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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The microscopic origin of triplet superconductivity in Sr_2RuO_4 is discussed, paying attention to the role of Coulomb interaction, U_<pp>, at the O site. It is shown on the d-p model that U_<pp> induces a ferromagnetic exchange interaction between "d-electrons" (molecular orbital with d_<xy>-symmetry) at adjacent Ru sites, leading to short-range ferromagnetic correlations and promoting Cooper pairing with (sin p_x±i sin P_y)-symmetry on the γ-band. The reason why such ferromagnetic correlations work effectively may be traced back to the fact that the level of 4d-electrons at Ru sites is relatively low and located near that of 2p-electrons at O sites.
- 2005-10-15
著者
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Miyake Kazumasa
Division Of Endocrine Surgery Kawasaki Medical School.
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Kosaki Masato
Graduate_school Of Science Osaka University
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HOSHIHARA Kengo
Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engin
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Hoshihara Kengo
Division Of Materials Physics Department Of Materials Engineering Science Graduate School Of Enginee
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HOSHIHARA Kengo
Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University
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