Effect of spin fluctuations on superconductivity in V and Nb: A first-principles study
Effect of spin fluctuations on superconductivity in V and Nb: A first-principles study
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自旋涨落对 V 和 Nb 超导性的影响：第一性原理研究
DOI：
10.1103/physrevb.102.214515
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发表时间：
2020
影响因子：
3.7
通讯作者：
Tsuneyuki Shinji
中科院分区：
文献类型：
--
作者：
Tsutsumi Kentaro;Hizume Yuma;Kawamura Mitsuaki;Akashi Ryosuke;Tsuneyuki Shinji
本文采用最近发展起来的基于超导体密度泛函理论的非经验计算方法，研究了典型能带元素超导体V和Nb的超导电性。铁磁涨落（顺磁子）对超导转变温度的影响，在原则上，抑制波超导配对，量化没有任何经验参数。我们发现强顺磁效应抵消了声子介导的配对和动力学屏蔽库仑相互作用的增强效应。
We study the superconductivity in typical-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, which, in principle, suppresses the-wave superconducting pairing, is quantified without any empirical parameter. We show that the strong paramagnon effect cancels the-enhancing effects of the phonon-mediated pairing and dynamical screened Coulomb interaction.