Effect of spin fluctuations on superconductivity in V and Nb: A first-principles study

Kentaro Tsutsumi; Yuma Hizume; Mitsuaki Kawamura; Ryosuke Akashi; Shinji Tsuneyuki

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Effect of spin fluctuations on superconductivity in V and Nb: A first-principles study

机译：旋转波动对V和NB中超导电性的影响：第一原理研究

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We study the superconductivity in typical d-band elemental superconductors V and Nb with the recently developed nonempirical computational scheme based on the density functional theory for superconductors. The effect of ferromagnetic fluctuation (paramagnon) on the superconducting transition temperature T_c, which, in principle, suppresses the s-wave superconducting pairing, is quantified without any empirical parameter. We show that the strong paramagnon effect cancels the T_c-enhancing effects of the phonon-mediated pairing and dynamical screened Coulomb interaction.

机译：我们研究了典型的D波段元素超导体V和NB中的超导，基于超导体的密度泛函理论，最近开发的非透明计算方案。在超导转变温度T_C上的铁磁波动（PARAGNON）对超导转变温度T_C的影响，其在没有任何经验参数的情况下量化了抑制S波超导配对。我们表明，强大的帕隆尼效应取消了声子介导的配对和动态筛选库仑相互作用的T_C增强效果。

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《Physical review.B.Condensed matter and materials physics》 |2020年第21期|214515.1-214515.10|共10页
作者
Kentaro Tsutsumi; Yuma Hizume; Mitsuaki Kawamura; Ryosuke Akashi; Shinji Tsuneyuki;
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Department of Physics University of Tokyo Hongo Bunkyo-ku 113-8656 Japan;

Department of Physics University of Tokyo Hongo Bunkyo-ku 113-8656 Japan;

Institute for Solid Stale Physics University of Tokyo Kashiwa 277-8581 Japan;

Department of Physics University of Tokyo Hongo Bunkyo-ku 113-8656 Japan;

Department of Physics University of Tokyo Hongo Bunkyo-ku 113-8656 Japan Institute for Solid Stale Physics University of Tokyo Kashiwa 277-8581 Japan;

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1. Advanced first-principles theory of superconductivity including both lattice vibrations and spin fluctuations: The case of FeB_4 [J] . J. Bekaert, A. Aperis, B. Partoens, Physical review. B, Condensed Matter And Materals Physics . 2018,第1期

机译：包括晶格振动和自旋涨落的超导的先进第一性原理：FeB_4的情况
2. Advanced first-principles theory of superconductivity including both lattice vibrations and spin fluctuations: The case of FeB4 [J] . Bekaert J., Aperis A., Partoens B., Physical review, B . 2018,第1期

机译：高级第一原理超导理论，包括晶格振动和旋转波动：2月4日的情况
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机译：Na插入双层NbSe_2的第一性原理研究：抑制的电荷密度波和应变增强的超导性
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机译：BA（Fe_（1-X）CO_X）_2AS_2铁酸酯的超导旋转机理
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机译：铁毒性旋转波动与超导性研究
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机译：自旋涨落和自旋涨落引起的超导理论的发展
7. Effect of spin fluctuations on superconductivity in V and Nb: A first-principles study [O] . Kentaro Tsutsumi, Yuma Hizume, Mitsuaki Kawamura, 2020

机译：旋转波动对V和NB中超导电性的影响：第一原理研究
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机译：海森堡磁体中的临界和顺磁自旋波动。

Effect of spin fluctuations on superconductivity in V and Nb: A first-principles study

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