Electron-phonon coupling and a resonant-like optical observation of a band inversion in topological crystalline insulator Pb${}_{1-x}$Sn${}_x$Se

Mariusz Woźny, Wojciech Szuszkiewicz, Mateusz Dyksik +5

The optical reflectivity of Pb${}_{0.865}$Sn${}_{0.135}$Se and Pb${}_{0.75}$Sn${}_{0.25}$Se solid solutions was measured in the THz spectral region energetically corresponding to bulk opti…