Type-I superconductivity in single-crystal Pb2Pd

We have investigated the superconducting properties in a single crystal of the superconductor ${\mathrm{Pb}}₂\mathrm{Pd}$ via various techniques including, magnetization, AC transport, transverse field muon spin rotation and relaxation, and heat capacity. All measurements confirm the superconducting transition temperature ${T}_C=3.0\ifmmode\pm\else\textpm\fi{}0.1\phantom{\rule{0.28em}{0ex}}\mathrm{K}$. Electronic specific-heat data are well described by the BCS expression, suggesting that ${\mathrm{Pb}}₂\mathrm{Pd}$ opens an isotropic gap on entering the superconducting state. Specific-heat jump and the ${\ensuremath{\lambda}}_{e\text{\ensuremath{-}}ph}$ value categorize ${\mathrm{Pb}}₂\mathrm{Pd}$ as a moderately coupled superconductor. Magnetization and transverse field muon spin rotation measurements along with the Ginzburg-Landau parameter, $\ensuremath{\kappa}$ $1/\sqrt{2}$ demonstrates that ${\mathrm{Pb}}₂\mathrm{Pd}$ is a type-I superconductor.