Phonon thermal transport in Bi2Te3/Sb2Te3 monolayer superlattice: a neural network potential study

The decrease of thermal conductivity in coherent short-period Bi 2 Te 3 /Sb 2 Te 3 monolayer superlattices is attributed to the variation of phonon scattering behaviors, rather than the decrease in phonon group velocity, which is contrary to expectations.