Coexistence of low moment magnetism and superconductivity in tetragonal FeS and suppression of $T_\mathrm{c}$ under pressure
| Autor: | E. Morenzoni, Anthony A. Amato, Stefan Holenstein, Hans-Henning Klauss, Dirk Johrendt, C. Baines, Sirko Kamusella, Zurab Guguchia, Ursula Pachmayr, Hubertus Luetkens, Rustem Khasanov |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Superconductivity Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Magnetism Transition temperature Condensed Matter - Superconductivity FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Lambda 01 natural sciences law.invention Superconductivity (cond-mat.supr-con) Superfluidity Tetragonal crystal system Condensed Matter - Strongly Correlated Electrons law Condensed Matter::Superconductivity 0103 physical sciences Hydrostatic equilibrium 010306 general physics 0210 nano-technology Penetration depth |
| Popis: | 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 ($10^{-2}-10^{-3}\mu_\mathrm{B})$ disordered magnetism with a transition temperature of $T_\mathrm{N}\approx 20$ K microscopically coexists with bulk superconductivity below $T_\mathrm{c}=4.3(1)$ K. From transverse field $\mu$SR we obtain an in-plane penetration depth $\lambda_\mathrm{ab}(0)=223(2)$ nm for FeS. The temperature dependence of the corresponding superfluid density $\lambda_\mathrm{ab}^{-2}(T)$ indicates a fully gapped superconducting state and is consistent with a two gap s-wave model. Additionally, we find that the superconducting $T_\mathrm{c}$ of FeS continuously decreases for hydrostatic pressures up to 2.2 GPa. Comment: 10 pages, 7 figures, including supplemental material |
| Databáze: | OpenAIRE |
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