Electron-phonon interaction and superconductivity in BaIr2P2

Detailed calculations of the electronic structure, phonons and electron–phonon coupling of the superconducting compound BaIr2P2 were performed from first-principles. The electronic structure showed excellent agreement with the available experimental data. The total electron–phonon coupling constant was and the logarithmically averaged phonon frequency was K. From the Allen–Dynes formula, with , the superconducting critical temperature was estimated to be K, which is in excellent agreement with the experiment. These results indicate that the electron–phonon coupling is of moderate strength and is easily capable of supporting the observed superconductivity.