Strong electron-phonon interaction in multiband superconductors

被引：14

作者：

Dolgov, O. V. ^{[1
]}

Golubov, A. A. ^{[2
,3
]}

机构：

[1] Max Planck Inst Festkorperphys, D-70569 Stuttgart, Germany

[2] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

[3] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.77.214526

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We discuss the effects of anisotropy on superconducting critical temperature and order parameter in a strongly coupled regime. The multiband representation is used as a model for anisotropy. We show that strong-coupling effects in multiband superconductors lead to pair breaking due to interband coupling because soft phonon modes play the same role as static impurities. This effect makes the order parameters in different bands equal to each other and limits the upper bound on critical temperature.

引用

页数：5

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