Superconductivity at ∼0.049 K in Laves Phase HfZn2 Predicted by First Principles

We report the superconductivity at T c ~ 0.049 K in Laves phase HfZn 2 .Based on the first principles method we have studied the details structural and electronic properties of HfZn 2 according to which there are 4.67 states eV -1 fu -1 at Fermi level.Using this value we calculate the specific heat coefficient γ theoretically as 10.97 mJ/ K 2 mol and then systematically calculate the electron-phonon coupling constant λ as 0.45.Finally applying these values in McMillan formula we get the superconducting critical temperature of HfZn 2 as approximately 0.049 K.