期刊
REPORTS ON PROGRESS IN PHYSICS
卷 74, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0034-4885/74/12/124508
关键词
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资金
- DOE [DE-FG02-05ER46236, NSF-DMR-1005625]
- RFBR [09-02-00127]
- Presidium of RAS [N5.7]
- FCP Scientific and Research-and-Educational Personnel of Innovative Russia [GK P891, GK 16.740.12.0731]
- President of Russia [MK-1683.2010.2]
- Kavli Institute for Theoretical Physics
- Stanford Institute for Materials and Energy Science
The recently discovered Fe-pnictide and chalcogenide superconductors display low-temperature properties suggesting superconducting gap structures which appear to vary substantially from family to family, and even within families as a function of doping or pressure. We propose that this apparent nonuniversality can actually be understood by considering the predictions of spin fluctuation theory and accounting for the peculiar electronic structure of these systems, coupled with the likely 'sign-changing s-wave' (s(+/-)) symmetry. We review theoretical aspects, materials properties and experimental evidence relevant to this suggestion, and discuss which further measurements would be useful to settle these issues.
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