Prospect of Node-Line Semimetal Cu3PdN to Be a Topological Superconductor

We investigate systematically the vibrational and electron-phonon interaction properties of node-line semimetal Cu3PdN under strain and electron doping by using first-principles calculations. It is found that vibrational modes interact with electrons at the Fermi level isotropically with a three-dimensional character. The phonon frequency and Eliashberg spectral function can be tuned by strain remarkably, and the maximum transition temperature (T-c) predicted is 0.03 K under strain epsilon = 0.10. The coexistence of superconductivity and topological physics in Cu3PdN makes it a promising candidate for future quantum computation platform.