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- W2545947651 abstract "We calculate superconducting gaps and quasiparticle density of states of ${mathrm{YNi}}_{2}{mathrm{B}}_{2}mathrm{C}$ in the framework of the density functional theory for superconductors to investigate the origin of highly anisotropic superconducting gaps in this material. Calculated phonon frequencies, the quasiparticle density of states, and the transition temperature show good agreement with experimental results. From our calculation of superconducting gaps and orbital character analysis, we establish that the orbital character variation of the Fermi surface is the key factor of the anisotropic gap. Since the electronic states that consist of mainly Ni $3d$ orbitals couple weakly with phonons, the superconducting gap function is suppressed for the corresponding states, which results in the anisotropy observed in the experiments. These results are hints to increase the transition temperature of materials in the borocarbide family." @default.
- W2545947651 created "2016-11-04" @default.
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- W2545947651 date "2017-02-14" @default.
- W2545947651 modified "2023-09-30" @default.
- W2545947651 title "Anisotropic superconducting gaps in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>YNi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>B</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>C</mml:mi></mml:mrow></mml:math>: A first-principles investigation" @default.
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- W2545947651 doi "https://doi.org/10.1103/physrevb.95.054506" @default.
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