Supplement materials

Supporting Information summarize supplementary results for monolayer penta-graphene, including the crystal structure and electronic DOS highlighting the van Hove singularity, the comparison of (\kappa_L) from three-phonon versus three-plus-four-phonon scattering, the branch-resolved suppression of (\kappa_L) with carrier concentration (correlated with the el-DOS), and the energy-dependent electron relaxation time at 300 K (first-principles vs CRTA).