s- and d-wave solution of Eliashberg equations with finite bandwidth

被引：6

作者：

Ummarino, GA ^{[1
]}

Gonnelli, RS ^{[1
]}

机构：

[1] Politecn Torino, Dipartimento Fis, INFM, I-10129 Turin, Italy

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2000年 / 341卷

关键词：

D O I：

10.1016/S0921-4534(00)00487-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work, we discuss the results of the direct solution of the Eliashberg equations with finite bandwidth, in the cases of s- and d-wave symmetry for the pair wave function and in the presence of scattering from impurities. We show that the reduction of the critical temperature T(c) due to the finite bandwidth depends on the value of the bandwidth itself, but is almost independent of the symmetry of the order parameter. The same happens for the shape of Z(omega) and Delta(omega). Moreover, we discuss the effect of the finite bandwidth on the shape of the quasiparticle density of slates. The results clearly indicate that the infinite bandwidth approximation leads to an underestimation of the electron-boson coupling constant.

引用

页码：295 / 296

页数：2

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