Gap symmetry and structure of Fe-based superconductors

被引：993

作者：

Hirschfeld, P. J. ^{[1
]}

Korshunov, M. M. ^{[1
,2
]}

Mazin, I. I. ^{[3
]}

机构：

[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[2] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

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

来源：

REPORTS ON PROGRESS IN PHYSICS | 2011年 / 74卷 / 12期

关键词：

D-WAVE SUPERCONDUCTORS; DENSITY-OF-STATES; HIGH-TEMPERATURE SUPERCONDUCTIVITY; RESOLVED PHOTOEMISSION-SPECTROSCOPY; IRON-BASED SUPERCONDUCTORS; UNCONVENTIONAL SUPERCONDUCTORS; ANISOTROPIC SUPERCONDUCTORS; RENORMALIZATION-GROUP; PAIRING SYMMETRY; CUPRATE SUPERCONDUCTORS;

D O I：

10.1088/0034-4885/74/12/124508

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：44

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