Possible pairing states of the Fe-based superconductors

被引：96

作者：

Bang, Yunkyu ^{[1
,2
]}

Choi, Han-Yong ^{[3
,4
]}

机构：

[1] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea

[2] Asia Pacific Ctr Theoret Phys, Pohang 790784, South Korea

[3] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[4] Sungkyunkwan Univ, Inst Basic Sci Res, Suwon 440746, South Korea

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.78.134523

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We consider the minimal two-band model for the Fe-based superconductors with a phenomenological pairing interaction which mimics short-range antiferromagnetic fluctuations. Two superconducting (SC) gap solutions are found to exist with the model: sign-changing s-wave gap (+/- s wave) and double d-wave gap states. Both solutions hold the approximate relation Delta(max)(h)N(h)approximate to Delta(max)(e)N(e), a generic feature of two-band model with a dominant interband pairing interaction. We carried out the calculations of the SC properties of the both SC states such as the density of states, temperature dependencies of spin-lattice relaxation rate 1/T(1), Knight shift, and penetration depth, particularly taking into account of the interband coherence factors. The results are discussed in comparison with the currently available experimental data.

引用

页数：10