Electron-phonon coupling and superconductivity in the doped topological-crystalline insulator (Pb${}_{0.5}$Sn${}_{0.5}$)${}_{1-x}$In${}_x$Te

A. Sapkota, Y. Li, B. L. Winn +12

We present a neutron scattering study of phonons in single crystals of (Pb${}_{0.5}$Sn${}_{0.5}$)${}_{1-x}$In${}_x$Te with $x=0$ (metallic, but nonsuperconducting) and $x=0.2$ (nonmetallic…