Functional Renormalization-Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs-Based High-Temperature Superconductor

被引：419

作者：

Wang, Fa ^{[1
,2
]}

Zhai, Hui ^{[1
,2
]}

Ran, Ying ^{[1
,2
]}

Vishwanath, Ashvin ^{[1
,2
]}

Lee, Dung-Hai ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 04期

关键词：

LAYERED SUPERCONDUCTOR;

D O I：

10.1103/PhysRevLett.102.047005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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