We report on the magnetic and superconducting properties of LaO0.5F0.5BiS2 by means of zero- and transverse-field (ZF/TF) muon-spin spectroscopy measurements (μSR). Contrary to previous results on iron-based superconductors, measurements in zero field demonstrate the absence of magnetically ordered phases. TF-μSR data give access to the superfluid density, which shows a marked two-dimensional 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.
We report on the magnetic and superconducting properties of LaO0.5F0.5BiS2 by means of zero-and transverse-field (ZF/TF) muon-spin spectroscopy measurements (mu SR). Contrary to previous results on iron-based superconductors, measurements in zero field demonstrate the absence of magnetically ordered phases. TF-mu SR data give access to the superfluid density, which shows a marked two-dimensional 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.
s-wave pairing in the optimally doped LaO0.5F0.5BiS2 superconductor / Lamura, G.; Shiroka, T.; Bonfa', Pietro; Sanna, S.; DE RENZI, Roberto; Baines, C.; Luetkens, H.; Mizuguchi, Y.; Deguchi, K.; Takano, Y.; Putti, M.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 88:18(2013), pp. 180509-1-180509-5. [10.1103/PhysRevB.88.180509]
s-wave pairing in the optimally doped LaO0.5F0.5BiS2 superconductor
BONFA', Pietro;
2013
Abstract
We report on the magnetic and superconducting properties of LaO0.5F0.5BiS2 by means of zero-and transverse-field (ZF/TF) muon-spin spectroscopy measurements (mu SR). Contrary to previous results on iron-based superconductors, measurements in zero field demonstrate the absence of magnetically ordered phases. TF-mu SR data give access to the superfluid density, which shows a marked two-dimensional 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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