Fig. 6: Effect of the inclusion of four phonon scattering.

a The four-phonons scattering rates—shown here are at RT—are non-negligible with respect to the three-phonon contribution. b Lattice thermal conductivity is consequently reduced.

a The four-phonons scattering rates—shown here are at RT—are non-negligible with respect to the three-phonon contribution. b Lattice thermal conductivity is consequently reduced.