S-wave pairing in the optimally doped LaO0.5F 0.5BiS2 superconductor

G. Lamura; T. Shiroka; P. Bonfà; S. Sanna; R. De Renzi; C. Baines; H. Luetkens; J. Kajitani; Y. Mizuguchi; O. Miura; K. Deguchi; S. Demura; Y. Takano; M. Putti

doi:10.1103/PhysRevB.88.180509

S-wave pairing in the optimally doped LaO_0.5F _0.5BiS₂ superconductor

G. Lamura, T. Shiroka, P. Bonfà, S. Sanna, R. De Renzi, C. Baines, H. Luetkens, J. Kajitani, Y. Mizuguchi, O. Miura, K. Deguchi, S. Demura, Y. Takano, M. Putti

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54 Citations (Scopus)

Abstract

We report on the magnetic and superconducting properties of LaO _0.5F_0.5BiS₂ 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.

Original language	English
Article number	180509
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	88
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.88.180509
Publication status	Published - 20 Nov 2013
Externally published	Yes

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Lamura, G., Shiroka, T., Bonfà, P., Sanna, S., De Renzi, R., Baines, C., Luetkens, H., Kajitani, J., Mizuguchi, Y., Miura, O., Deguchi, K., Demura, S., Takano, Y., & Putti, M. (2013). S-wave pairing in the optimally doped LaO_0.5F _0.5BiS₂ superconductor. Physical Review B - Condensed Matter and Materials Physics, 88(18), Article 180509. https://doi.org/10.1103/PhysRevB.88.180509

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abstract = "We report on the magnetic and superconducting properties of LaO 0.5F0.5BiS2 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.",

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AU - Lamura, G.

AU - Shiroka, T.

AU - Bonfà, P.

AU - Sanna, S.

AU - De Renzi, R.

AU - Baines, C.

AU - Luetkens, H.

AU - Kajitani, J.

AU - Mizuguchi, Y.

AU - Miura, O.

AU - Deguchi, K.

AU - Demura, S.

AU - Takano, Y.

AU - Putti, M.

PY - 2013/11/20

Y1 - 2013/11/20

N2 - We report on the magnetic and superconducting properties of LaO 0.5F0.5BiS2 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.

AB - We report on the magnetic and superconducting properties of LaO 0.5F0.5BiS2 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.

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S-wave pairing in the optimally doped LaO_0.5F _0.5BiS₂ superconductor

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