Even parity, orbital singlet, and spin triplet pairing for superconducting LaFeAsO1-xFx

被引：106

作者：

Dai, Xi ^{[1
,2
]}

Fang, Zhong ^{[1
,2
]}

Zhou, Yi ^{[3
,4
]}

Zhang, Fu-Chun ^{[3
,4
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China

[4] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.101.057008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We examine the spin-triplet superconducting state of even parity mediated by ferromagnetic Hund's coupling between electrons in two almost degenerate orbital bands. This state may be realized in the recently discovered LaFeAsO1-xFx. It is robust against orbital-independent disorder. The splitting of the orbital degeneracy suppresses superconductivity and leads to an anisotropic spectrum in the Bogoliubov quasiparticle. The former predicts a strong pressure dependence of T-c and the latter predicts Fermi pockets, which may be tested in angle resolved photoemission spectra.

引用

页数：4

共 34 条

[1] Josephson effects between multigap and single-gap superconductors [J].