Functional renormalization-group study of the pairing symmetry and pairing mechanism of the FeAs-based high-temperature superconductor

We apply the fermion functional renormalization-group method to determine the pairing symmetry and pairing mechanism of the FeAs-Based materials. Within a five band model with pure repulsive interactions, we find an electronic-driven superconducting pairing instability. For the doping and interactio...

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Bibliographic Details
Published in:Physical review letters 2009-01, Vol.102 (4), p.047005-047005, Article 047005
Main Authors: Wang, Fa, Zhai, Hui, Ran, Ying, Vishwanath, Ashvin, Lee, Dung-Hai
Format: Article
Language:English
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Summary:We apply the fermion functional renormalization-group method to determine the pairing symmetry and pairing mechanism of the FeAs-Based materials. Within a five band model with pure repulsive interactions, we find an electronic-driven superconducting pairing instability. For the doping and interaction parameters we have examined, extended s wave, whose order parameter takes on opposite sign on the electron and hole pockets, is always the most favorable pairing symmetry. The pairing mechanism is the inter-Fermi-surface Josephson scattering generated by the antiferromagnetic correlation.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.102.047005