论文标题
从伊利亚斯贝格和密度功能形式主义内的等离子体超导性的初始化理论
Ab initio theory of plasmonic superconductivity within the Eliashberg and density-functional formalisms
论文作者
论文摘要
我们扩展了\ emph {ab intio}语音介导的超导体的计算描述，即超导体（SCDFT）的密度fu nttery理论，以包括等离子效应。除了ermore，我们引入了一种杂种形式主义，其中电子 - 音波耦合的EliAshberg近似值与动态筛选的库仑相互作用的SCDFT处理结合在一起。通过研究等离子体贡献如何在确定临界温度（\ tc）时，通过研究了等离子体贡献如何ffect a ffect a ffect，对这些方法进行了测试。我们的模拟表明，等离子SCDFT导致预测ED和测量\ TC之间的良好一致性，而Eliashberg理论大大高估了等离子体介导的配对，因此，\ tc。另一方面，混合方法可以使结果接近SCDFT，并且与实验成像非常吻合。
We extend the two leading methods for the \emph{ab initio} computational descrip tion of phonon-mediated superconductors, namely Eliashberg theory and density fu nctional theory for superconductors (SCDFT), to include plasmonic effects. Furth ermore, we introduce a hybrid formalism in which the Eliashberg approximation fo r the electron-phonon coupling is combined with the SCDFT treatment of the dynam ically screened Coulomb interaction. The methods have been tested on a set of we ll-known conventional superconductors by studying how the plasmon contribution a ffects the phononic mechanism in determining the critical temperature (\tc). Our simulations show that plasmonic SCDFT leads to a good agreement between predict ed and measured \tc's, whereas Eliashberg theory considerably overestimates the plasmon-mediated pairing and, therefore, \tc. The hybrid approach, on the other hand, gives results close to SCDFT and overall in excellent agreement with exper iments.
