s-wave pairing in the optimally-doped LaO0.5F0.5BiS2 superconductor

Abstract

We report on the magnetic and superconducting properties of LaO0.5F0.5BiS2 by means of zero- (ZF) and transverse-field (TF) muon-spin spectroscopy measurements (uSR). Contrary to previous results on iron-based superconductors, measurements in zero field demonstrate the absence of magnetically ordered phases. TF-uSR data give access to the superfluid density, which shows a marked 2D character with a dominant s-wave temperature behavior. The field dependence of the magnetic penetration depth confirms this finding and further suggests the presence of an anisotropic superconducting gap.

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• Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor
• SnAs-based layered superconductor NaSn2As2
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• Indication of unconventional superconductivity in layered bismuth chalcogenide superconductor LaO0.6F0.4Bi(S,Se)2 revealed by Se isotope effect
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• Superconducting gap symmetry of the BiS${}_2$-based superconductor LaO${}_{0.5}$F${}_{0.5}$BiSSe elucidated through specific heat measurement
• BCS-like superconductivity in NdO${}_{1-x}$F${}_x$BiS${}_2$ ($x$ = 0.3 and 0.5) single crystals
• Theoretical aspects of the study on the new bismuth chalcogenide based superconductors
• Effect of high pressure annealing on the normal state transport of LaO0.5F0.5BiS2
• Effect of yttrium substitution on the superconducting properties of the system La${}_{1-\text{x}}$Y${}_{\text{x}}$O${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Electron-Phonon Superconductivity in LaO${}_{0.5}$F${}_{0.5}$BiSe${}_2$
• Localized and mixed valence state of Ce $4f$ in superconducting and ferromagnetic CeO${}_{1-x}$F${}_x$BiS${}_2$ revealed by x-ray absorption and photoemission spectroscopy
• Bulk superconductivity in single phase Bi3O2S3
• Testing the $d_{x^2-y^2}^{\ast }$-wave pairing symmetry by quasiparticle interference in BiS${}_2$-based superconductors
• Fermi-Surface Topology and Pairing Symmetry in BiS${}_2$-Based Layered Superconductors
• Unconventional isotope effect on transition temperature in BiS2-based superconductor Bi4O4S3
• Superconducting gap structure in ambient-pressure-grown $\mathrm{La}{\mathrm{O}}_{0.5}{\mathrm{F}}_{0.5}\mathrm{Bi}{\mathrm{S}}_2$
• Superconductivity in La1-xCexOBiSSe: carrier doping by mixed valence of Ce ions
• Superconductivity and abnormal pressure effect in Sr0.5La0.5FBiSe2 superconductor
• Impurity Effects in Nodal Extended $s$- and Nodeless $d$-Wave Superconductors: Gap Symmetry of BiS${}_2$-Based Layered Superconductors
• Evidence of a pseudogap driven by competing orders of multi-band origin in the ferromagnetic superconductor Sr${}_{0.5}$Ce${}_{0.5}$FBiS${}_2$
• Renormalizations in unconventional superconducting states of Ce${}_{1-x}$Yb${}_x$CoIn${}_5$
• Bulk superconductivity induced by Se substitution in self-doped BiCh2-based compound CeOBiS2-xSex
• Pressure-induced superconductivity in layered pnictogen diselenide NdO${}_{0.8}$F${}_{0.2}$Sb${}_{1-x}$Bi${}_x$Se${}_2$ (x = 0.3 and 0.7)
• Pressure tuning of localization and superconductivity in LaOPbBiS${}_3$ and La${}_2$O${}_2$Bi${}_3$AgS${}_6$
• The upper critical field in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3)