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- W2083068234 abstract "In order to explore a correlation between superconductivity and the electronic structure of Ni-based superconducting quaternary compounds, a systematic investigation of the electronic structures for ${mathrm{YNi}}_{2}$${mathrm{B}}_{2}$X (X=B, C, N, and O) is carried out, by employing the linearized muffin-tin orbital band method. It is found that the Ni 3d density of states (DOS) in ${mathrm{YNi}}_{2}$${mathrm{B}}_{2}$C is broader than in fcc Ni metal, and so N(${mathit{E}}_{mathit{F}}$) becomes small enough to make the system nonferromagnetic and then superconducting. A rigid-band-like shift of the Fermi level is observed as atom X varies. In the case of ${mathrm{YNi}}_{2}$${mathrm{B}}_{2}$C, the Fermi level is located right at the van Hove--like singular DOS peak, which originates from saddle-point extremal band crossing ensuremath{Gamma}. This singular DOS peak at ${mathit{E}}_{mathit{F}}$ is expected to be related to the superconductivity observed in ${mathrm{YNi}}_{2}$${mathrm{B}}_{2}$C. A crude estimate within the framework of the simple rigid-ion approximation indicates that the superconductivity in ${mathrm{YNi}}_{2}$${mathrm{B}}_{2}$C can be properly described by the conventional phonon mechanism." @default.
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- W2083068234 title "Electronic structure of Ni-based superconducting quaternary compounds:<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>YNi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>B</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:…" @default.
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- W2083068234 doi "https://doi.org/10.1103/physrevb.50.4030" @default.
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