Coexistence of low-moment magnetism and superconductivity in tetragonal FeS and suppression of T-c under pressure
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
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.
Details
Original language | English |
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Article number | 140506 |
Number of pages | 6 |
Journal | Physical Review B |
Volume | 93 |
Issue number | 14 |
Publication status | Published - 25 Apr 2016 |
Peer-reviewed | Yes |
External IDs
Scopus | 84964687512 |
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Keywords
Keywords
- HIGH-TEMPERATURE SUPERCONDUCTIVITY, PENETRATION DEPTH, PHASE-DIAGRAM, DEPENDENCE, DENSITY, SPIN