Enhancement of Superconductivity near a Nematic Quantum Critical Point

被引：241

作者：

Lederer, S. ^{[1
]}

Schattner, Y. ^{[2
]}

Berg, E. ^{[2
]}

Kivelson, S. A. ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 09期

基金：

以色列科学基金会; 美国国家科学基金会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; PHASE COMPETITION; PSEUDOGAP; INSTABILITY; SYMMETRY; ORDER;

D O I：

10.1103/PhysRevLett.114.097001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a low T-c metallic superconductor weakly coupled to the soft fluctuations associated with proximity to a nematic quantum critical point (NQCP). We show that (1) a BCS-Eliashberg treatment remains valid outside of a parametrically narrow interval about the NQCP, (2) the symmetry of the superconducting state (d wave, s wave, p wave) is typically determined by the noncritical interactions, but T-c is enhanced by the nematic fluctuations in all channels, and (3) in 2D, this enhancement grows upon approach to criticality up to the point at which the weak coupling approach breaks down, but in 3D, the enhancement is much weaker.

引用

页数：6

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