Studies on two-gap superconductivity in 2H-NbS2

J. Kačmarčík; Z. Pribulová; C. Marcenat; T. Klein; P. Rodire; L. Cario; P. Samuely

doi:10.1016/j.physc.2009.10.131

Studies on two-gap superconductivity in 2H-NbS₂

J. Kačmarčík
, Z. Pribulová
, C. Marcenat
, T. Klein
, P. Rodire
, L. Cario
, P. Samuely

École Polytechnique

Research output: Contribution to journal › Article › peer-review

Abstract

We present the ac-calorimetry measurements of superconducting 2H-NbS ₂ in the temperature range down to 0.6 K and magnetic fields up to 8 T. The temperature and magnetic field dependence of the electronic specific heat consistently indicate existence of two superconducting energy gaps in the system - one of them with the coupling ratio below the BCS weak-coupling limit and the other above that value. These results support previous findings by scanning tunneling microscopy and spectroscopy measurements [I. Guillamón, H. Suderow, S. Vieira, L. Cario, et al., Phys. Rev. Lett. 101 (2008) 166407] of two pronounced features in density of states related to a two-gap superconductivity in this system.

Original language	English
Pages (from-to)	S719-S720
Journal	Physica C: Superconductivity and its Applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.131
Publication status	Published - 1 Jan 2010

Keywords

Multi-gap superconductivity
Specific heat

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10.1016/j.physc.2009.10.131

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title = "Studies on two-gap superconductivity in 2H-NbS2 ",

abstract = "We present the ac-calorimetry measurements of superconducting 2H-NbS 2 in the temperature range down to 0.6 K and magnetic fields up to 8 T. The temperature and magnetic field dependence of the electronic specific heat consistently indicate existence of two superconducting energy gaps in the system - one of them with the coupling ratio below the BCS weak-coupling limit and the other above that value. These results support previous findings by scanning tunneling microscopy and spectroscopy measurements [I. Guillam{\'o}n, H. Suderow, S. Vieira, L. Cario, et al., Phys. Rev. Lett. 101 (2008) 166407] of two pronounced features in density of states related to a two-gap superconductivity in this system.",

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TY - JOUR

T1 - Studies on two-gap superconductivity in 2H-NbS2

AU - Kačmarčík, J.

AU - Pribulová, Z.

AU - Marcenat, C.

AU - Klein, T.

AU - Rodire, P.

AU - Cario, L.

AU - Samuely, P.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - We present the ac-calorimetry measurements of superconducting 2H-NbS 2 in the temperature range down to 0.6 K and magnetic fields up to 8 T. The temperature and magnetic field dependence of the electronic specific heat consistently indicate existence of two superconducting energy gaps in the system - one of them with the coupling ratio below the BCS weak-coupling limit and the other above that value. These results support previous findings by scanning tunneling microscopy and spectroscopy measurements [I. Guillamón, H. Suderow, S. Vieira, L. Cario, et al., Phys. Rev. Lett. 101 (2008) 166407] of two pronounced features in density of states related to a two-gap superconductivity in this system.

AB - We present the ac-calorimetry measurements of superconducting 2H-NbS 2 in the temperature range down to 0.6 K and magnetic fields up to 8 T. The temperature and magnetic field dependence of the electronic specific heat consistently indicate existence of two superconducting energy gaps in the system - one of them with the coupling ratio below the BCS weak-coupling limit and the other above that value. These results support previous findings by scanning tunneling microscopy and spectroscopy measurements [I. Guillamón, H. Suderow, S. Vieira, L. Cario, et al., Phys. Rev. Lett. 101 (2008) 166407] of two pronounced features in density of states related to a two-gap superconductivity in this system.

KW - Multi-gap superconductivity

KW - Specific heat

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DO - 10.1016/j.physc.2009.10.131

M3 - Article

AN - SCOPUS:78649698401

SN - 0921-4534

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.1

ER -

Studies on two-gap superconductivity in 2H-NbS₂

Abstract

Keywords

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