Coexistence of low-moment magnetism and superconductivity in tetragonal FeS and suppression of Tc under pressure

被引：34

作者：

Holenstein, S. ^{[1
,2
]}

Pachmayr, U. ^{[3
]}

Guguchia, Z. ^{[1
]}

Kamusella, S. ^{[4
]}

Khasanov, R. ^{[1
]}

Amato, A. ^{[1
]}

Baines, C. ^{[1
]}

Klauss, H-H ^{[4
]}

Morenzoni, E. ^{[1
,2
]}

Johrendt, D. ^{[3
]}

Luetkens, H. ^{[1
]}

机构：

[1] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[2] Univ Zurich, Inst Phys, Winterthurerstr 190, CH-8057 Zurich, Switzerland

[3] Univ Munich, Dept Chem, Butenandtstr 5-13 D, D-81377 Munich, Germany

[4] Tech Univ Dresden, Inst Festkorperphys, DE-01069 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 14期

基金：

瑞士国家科学基金会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; PENETRATION DEPTH; PHASE-DIAGRAM; DEPENDENCE; DENSITY; SPIN;

D O I：

10.1103/PhysRevB.93.140506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report local probe (mu SR) measurements on the recently discovered tetragonal FeS superconductor which has been predicted to be electronically very similar to superconducting FeSe. Most remarkably, we find that low-moment (10(-2)-10(-3) mu B) disordered magnetism with a transition temperature of T-N approximate to 20 K microscopically coexists with bulk superconductivity below T-c = 4.3(1) K. From transverse field mu SR we obtain an in-plane penetration depth lambda(ab)(0) = 223(2) nm for FeS. The temperature dependence of the corresponding superfluid density lambda(-2)(ab)(T) indicates a fully gapped superconducting state and is consistent with a two gap s-wave model. Additionally, we find that the superconducting T-c of FeS continuously decreases for hydrostatic pressures up to 2.2 GPa.

引用

页数：6

共 62 条

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