Possible Three-Dimensional Nodes in the s\pm Superconducting Gap of BaFe2(As1-xPx)2
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概要
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We theoretically examine the superconducting state of BaFe2(As1-xPx)2, an isovalent doping 122-iron-pnictide superconductor. We construct a three-dimensional 10-orbital model by first-principles band calculation, and investigate the superconducting gap within the spin-fluctuation-mediated pairing mechanism. The gap is basically s\pm, where the gap changes its sign between electron and hole Fermi surfaces, but three-dimensional nodal structures appear in the largely warped hole Fermi surface having a strong Z^{2}/\mathit{XZ}/\mathit{YZ} orbital character. The present result, together with our previous study of the 1111 systems, explains the strong material dependence of the superconducting gap in iron pnictides.
- 2011-01-15
著者
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Usui Hidetomo
Department Of Applied Physics And Chemistry The University Of Electro-communications
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Kuroki Kazuhiko
Department Of Applied Physics And Chemistry The University Of Electro-communications
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Suzuki Katsuhiro
Department Of Agricultural Chemistry Yamagata University:(present Office)ageo Research Laboratory Ni
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Kuroki Kazuhiko
Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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Usui Hidetomo
Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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