1Department of Physics, Renmin University of China, Beijing 100872 2National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190 3Collaborative Innovation Center of Advanced Microstructures, Beijing 100190
Abstract：We report on the single crystal growth and superconducting properties of PbTaSe$_2$ with the non-centrosymmetric crystal structure. By using the chemical vapor transport technique, centimeter-size single crystals are successfully obtained. The measurement of temperature dependence of electrical resistivity $\rho(T)$ in both normal and superconducting states indicates a quasi-two-dimensional electronic state in contrast to that of polycrystalline samples. Specific heat $C(T)$ measurement reveals a bulk superconductivity with $T_{\rm c}\simeq3.75$ K and a specific heat jump ratio of 1.42. All these results are in agreement with a moderately electron–phonon coupled, type-II Bardeen–Cooper–Schrieffer superconductor.
Singh R P, Hillier A D, Chowdhury D, Barker J A T, Paul D M, Lees M R and Balakrishnan G 2014 Phys. Rev. B 90 104504
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2016, Vol. 33 
