Umklapp scattering in unconventional superconductors: Microwave conductivity shows that κ-(BEDT-TTF)2Cu[N(CN)2]Br is a dxy superconductor

被引：4

作者：

Cavanagh, D. C. ^{[1
,2
]}

Powell, B. J. ^{[1
]}

机构：

[1] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[2] Univ Otago, Dept Phys, Dunedin 9054, New Zealand

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

PENETRATION-DEPTH; ELECTRICAL-CONDUCTIVITY; INTERACTING FERMIONS; PHASE-DIAGRAM; SYMMETRY; RESISTIVITY; MODEL; STATE;

D O I：

10.1103/PhysRevB.100.054505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microwave conductivity experiments can directly measure the quasiparticle scattering rate in the superconducting state. We show that this, combined with knowledge of the Fermi surface geometry, can distinguish between closely related superconducting order parameters, e.g., d(x2-y2) and d(xy) superconductivity. We benchmark this method on YBa2Cu3O7-(delta) and, unsurprisingly, confirm that this is a d(x2-y2) superconductor. We then apply our method to kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br, which we discover is a d(xy), superconductor.

引用

页数：6

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