Building efficient thermal transport of graphene/LiNbO3 heterogeneous interface

We investigate the thermal transport of the graphene/ferroelectric crystal lithium niobate (LiNbO 3 ) interface by molecular dynamics simulations . The results show that lithium niobate thickness are not significantly correlated with ITR, the increase of graphene area will slightly enhance ITR, and the enhancement of interfacial coupling strength leads to monotonic decrease of ITR. The increasing ambient temperature and graphene vacancy concentration promote the vibration of low-frequency phonons in graphene and lithium niobate, resulting in a gradual decrease in the ITR of the interface. In addition, low concentration hydrogenation on both sides of monolayer graphene can also effectively reduce ITR and improve the heat transfer performance between interfaces. This study contributes to understand the thermal transport of the graphene/LiNbO 3 interfaces and provides an effective method for efficient thermal management of graphene/LiNbO 3 interfaces in optoelectronic devices .