Persistent correlation between superconductivity and antiferromagnetic fluctuations near a nematic quantum critical point in FeSe1-xSx

被引：41

作者：

Wiecki, P. ^{[1
,2
]}

Rana, K. ^{[1
,2
]}

Boehmer, A. E. ^{[1
,2
,3
]}

Lee, Y. ^{[1
,2
]}

Bud'ko, S. L. ^{[1
,2
]}

Canfield, P. C. ^{[1
,2
]}

Furukawa, Y. ^{[1
,2
]}

机构：

[1] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[3] Karlsruhe Inst Technol, Inst Festkorperphys, D-76021 Karlsruhe, Germany

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 02期

关键词：

UNCONVENTIONAL SUPERCONDUCTIVITY; FESE; PRESSURE; ORDER;

D O I：

10.1103/PhysRevB.98.020507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present Se-77-NMR measurements on FeSe1-xSx samples with sulfur content x = 0%, 9%, 15%, and 29%. Twinned nematic domains are observed in the NMR spectrum for all samples except x = 29%. The NMR spin-lattice relaxation rate shows that antiferromagnetic (AFM) fluctuations are initially enhanced between x = 0% and x = 9%, but are strongly suppressed for higher x values. The observed behavior of the AFM fluctuations parallels the superconducting transition temperature T-c in these materials, providing strong evidence for the primary importance of AFM fluctuations for superconductivity, despite the presence of nematic quantum criticality in the FeSe1-xSx system.

引用

页数：6

共 44 条

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[44] Interplay between superconductivity and non-Fermi liquid at a quantum critical point in a metal. I. The. model and its phase diagram at T=0: The case 0 < γ < 1
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PHYSICAL REVIEW B, 2020, 102 (02)

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