Pairing Mechanism in Hund's Metal Superconductors and the Universality of the Superconducting Gap to Critical Temperature Ratio

被引：36

作者：

Lee, Tsung-Han ^{[1
]}

Chubukov, Andrey ^{[2
]}

Miao, Hu ^{[3
]}

Kotliar, Gabriel ^{[1
,3
]}

机构：

[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[2] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 18期

关键词：

T-C; IRON PNICTIDES; ELECTRONS; SYMMETRY;

D O I：

10.1103/PhysRevLett.121.187003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze a simple model containing the physical ingredients of a Hund's metal, the local spin fluctuations with power-law correlators, (Omega(0)/vertical bar Omega vertical bar)(gamma), with gamma greater than one, interacting with electronic quasiparticles. While the critical temperature and the gap change significantly with varying parameters, the 2 Delta(max)/k(B)T(c) remains close to twice the BCS value in agreement with experimental observations in the iron-based superconductors (FeSC).

引用

页数：7

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