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Article Dans Une Revue Physica C: Superconductivity and its Applications Année : 2010

Studies on two-gap superconductivity in 2H-NbS2

Résumé

We present the ac-calorimetry measurements of superconducting 2H-NbS2 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.

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hal-00957214 , version 1 (09-03-2014)

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Thierry Klein, J. Kacmarcík, Z. Pribulova, C. Marcenat, Pierre Rodière, et al.. Studies on two-gap superconductivity in 2H-NbS2. Physica C: Superconductivity and its Applications, 2010, 470, pp.S719. ⟨10.1016/j.physc.2009.10.131⟩. ⟨hal-00957214⟩
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