Superconducting and charge density wave transition in single crystalline LaPtSi.

We present results of our comprehensive studies on single crystalline LaPtSi. Pronounced anomaly in electrical resistivity and heat capacity confirms the bulk nature of superconductivity (SC) and charge density wave (CDW) transition in the single crystals. While the charge density wave transition temperature is lower, the superconducting transition temperature is higher in single crystal compared to the polycrystalline sample. This result confirms the competing nature of CDW and SC. Another important finding is the anomalous temperature dependence of upper critical field H (T). We also report the anisotropy in the transport and magnetic measurements of the single crystal.