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Specific Heat Study of Superconductivity in Cu_{0.061}TiSe_{2}

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Kačmarčík J., Pribulová Z., Pal'uchová V., Husaníková P., Karapetrov G., Komanický V., Samuely P.

In TiSe_{2} a charge-density-waves order is continuously suppressed by copper doping and superconductivity appears. We report a calorimetric study performed on the superconducting single crystal of Cu_{0.061}TiSe_{2} with T_{c}=2.8 K, measured by the ac technique at low temperatures down to 0.6 K and magnetic fields up to 2 T. Sharp specific heat anomaly at the superconducting transition is found. The temperature dependence of the electronic specific heat and the angular dependence of the critical temperature, measured at a fixed magnetic field, consistently indicate on the existence of a single s-wave superconducting gap with a coupling strength of 2Δ/k_{B}T_{c}=3.6, close to BCS limit.

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1 Acta Physica Polonica A

1 2014

1 Husaníková P.

1 Karapetrov G.

1 Kačmarčík J.

1 Komanický V.

1 Pal'uchová V.

1 Pribulová Z.

1 Samuely P.

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Specific Heat Study of Superconductivity in Cu_{0.061}TiSe_{2}