Superconductivity - a source of surprises

被引：7

作者：

Simon, A ^{[1
]}

机构：

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

来源：

SOLID STATE SCIENCES | 2005年 / 7卷 / 12期

关键词：

flat band/steep band; magnesium boride; rare earth carbides; rare earth carbide halides;

D O I：

10.1016/j.solidstatesciences.2005.04.019

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Superconductivity is ascribed to a tendency of pairwise localization of conduction electrons. As a necessary condition in k space bands with very small as well as large dispersion need to be present at the Fermi level ("flat band/steep band"). The sufficient condition is a strong enough coupling of the flat band states to specific phonons in case of phonon-mediated superconductivity. The electron-phonon coupling parameter a reveals a peak structure in the phonon q-space. These aspects are discussed for actual examples, e.g., rare earth carbides and carbide halides as well as MgB2. (c) 2005 Elsevier SAS. All rights reserved.

引用

页码：1451 / 1455

页数：5

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