Evolution of the Superconducting State of Fe-Based Compounds with Doping

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review Letters

OSTI ID:1032047

Maier, Thomas A ^[1]

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1. ORNL

We introduce an effective low-energy pairing model for Fe-based superconductors with s- and d-wave interaction components and a small number of input parameters and use it to study the doping evolution of the symmetry and the structure of the superconducting gap. We argue that the model describes the entire variety of pairing states found so far in the Fe-based superconductors and allows one to understand the mechanism of the attraction in s{sup {+-}} and d{sub x{sup 2}-y{sup 2}} channels, the competition between s- and d-wave solutions, and the origin of superconductivity in heavily doped systems, when only electron or only hole pockets are present.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1032047
• Journal Information: Physical Review Letters, Vol. 107, Issue 14; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
ORIGIN
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SYMMETRY