Four-phonon scattering and coherent heat transport in ultrawide-bandgap SrSnO3
SrSnO3 is a promising ultrawide-bandgap perovskite oxide whose thermal transport is governed by structural distortions and anharmonic lattice dynamics. Here, we investigate the lattice thermal conductivity (κL) of orthorhombic and cubic SrSnO3 within a unified first-principles framework combining self-consistent phonon...