Coexistence of low-moment magnetism and superconductivity in tetragonal FeS and suppression of T sub(c) under pressure

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 super(-2) 10 super(-3) sub([mu]B)) disordered magnetism with a transit...

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Bibliographic Details
Published in:Physical review. B 2016-04, Vol.93 (14)
Main Authors: Holenstein, S, Pachmayr, U, Guguchia, Z, Kamusella, S, Khasanov, R, Amato, A, Baines, C, Klauss, H-H, Morenzoni, E, Johrendt, D, Luetkens, H
Format: Article
Language:English
Subjects:
Condensed matter
Fluids
Hydrostatic pressure
Magnetism
Superconductivity
Temperature dependence
Texts
Transition temperature
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Summary: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 super(-2) 10 super(-3) sub([mu]B)) disordered magnetism with a transition temperature of T sub(N)[approximate]20 K microscopically coexists with bulk superconductivity below T sub(c)=4.3(1) K. From transverse field [mu]SR we obtain an in-plane penetration depth [lambda] sub(ab)(0)=223(2) nm for FeS. The temperature dependence of the corresponding superfluid density (ProQuest: Formulae and/or non-USASCII text omitted) indicates a fully gapped superconducting state and is consistent with a two gap s-wave model. Additionally, we find that the superconducting T sub(c) of FeS continuously decreases for hydrostatic pressures up to 2.2 GPa.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.93.140506