Unconventional superconductivity with a sign reversal in the order parameter of LaFeAsO1-xFx

被引：2246

作者：

Mazin, I. I. ^{[1
]}

Singh, D. J. ^{[2
]}

Johannes, M. D. ^{[1
]}

Du, M. H. ^{[2
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.101.057003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We argue that the newly discovered superconductivity in a nearly magnetic, Fe-based layered compound is unconventional and mediated by antiferromagnetic spin fluctuations, though different from the usual superexchange and specific to this compound. This resulting state is an example of extended s-wave pairing with a sign reversal of the order parameter between different Fermi surface sheets. The main role of doping in this scenario is to lower the density of states and suppress the pair-breaking ferromagnetic fluctuations.

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页数：4

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