Evidence of nodeless superconductivity in FeSe0.85 from a muon-spin-rotation study of the in-plane magnetic penetration depth

被引：105

作者：

Khasanov, R. ^{[1
]}

Conder, K. ^{[2
]}

Pomjakushina, E. ^{[2
,3
,4
]}

Amato, A. ^{[1
]}

Baines, C. ^{[1
]}

Bukowski, Z. ^{[5
]}

Karpinski, J. ^{[5
]}

Katrych, S. ^{[5
]}

Klauss, H.-H. ^{[6
]}

Luetkens, H. ^{[1
]}

Shengelaya, A. ^{[7
]}

Zhigadlo, N. D. ^{[5
]}

机构：

[1] PSI, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[2] PSI, Lab Dev & Methods, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[4] Swiss Fed Inst Technol, CH-5232 Villigen, Switzerland

[5] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[6] Tech Univ Dresden, IFP, D-01069 Dresden, Germany

[7] Tbilisi State Univ, Inst Phys, GE-0128 Tbilisi, Georgia

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 22期

关键词：

high-temperature superconductors; iron compounds; muon probes; penetration depth (superconductivity); superconducting energy gap;

D O I：

10.1103/PhysRevB.78.220510

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The in-plane magnetic penetration depth lambda(ab) of the iron selenide superconductor with the nominal composition FeSe0.85 was studied by means of muon-spin rotation. The measurements of lambda(-2)(ab)(T) are inconsistent with a simple isotropic s-wave type of the order parameter but are rather in favor of two-gap (s+s) and anisotropic s-wave order parameter symmetries, thus implying that the superconducting energy gap in FeSe0.85 contains no nodes.

引用

页数：4

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