Tuning graphene thermal modulator by rotating

Exploring the thermal transport of graphene is significant for the application of its thermal properties. However, it is still a challenge to regulate the thermal conductivity of graphene interface. We study the interfacial thermal transport mechanism of the bilayer graphene by utilizing the molecular dynamics simulations. During the simulation, the interfacial thermal conductivity is regulated and controlled by lattice matching and tailoring. The lattice mismatched bilayer graphene model, combining the straining and torsion, can increase the interfacial thermal resistance (ITR) about 3.7 times. The variation trend of the ITR is explained by utilizing the vibrational spectra and the overlap factor. Besides, the thermal conductivity is proportional to the overlapping area. Our results show that the tailoring models can regularly control the thermal conductivity in a wide range by twisting the angle between upper and lower layers. These findings can provide a guideline for thermoelectric management and device design of thermal switch.