Strongly anisotropic s-wave gaps in exotic superconductors

被引:23
作者
Brandow, BH [1 ]
机构
[1] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA
关键词
D O I
10.1080/0141861031000111129
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The exotic superconductors, defined as those that follow the phenomenological trend reported by Uemura (T-c approximately proportional to lambda(L)(-2)), at present constitute the most broad and general class Of Superconductors which can reasonably be considered 'similar to the high-T-c cuprates'. It is therefore of much interest to determine the forms of their pairing gap functions. We examine evidence for the gap forms in non-cuprate exotics and demonstrate some general features. The cubic materials often have highly anisotropic gaps. The planar materials tend to have an even stronger gap anisotropy, to the extent that they often have gap nodes, but nevertheless they usually have an s-wave-like gap symmetry. There is good evidence for the latter even in the controversial cases of planar organics and nickel borocarbides. Exceptions to these generalizations are also pointed out and discussed.
引用
收藏
页码:2487 / 2519
页数:33
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