▎ 摘　　要

Thermal conductivity (kappa) of the single-crystalline bilayer graphene (BLG) is investigated experimentally as a function of the interlayer twist angle (theta) and temperature using the optothermal Raman technique. The results show that a slight 2 degrees twist angle leads to a kappa decrease in 15% at similar to 320 K. With the regulation of theta from 0 degrees to 30 degrees, the in-plane kappa of the BLG decreases first and then increases showing an asymmetry V shape. The local maximum value of kappa was reached when the twist angle is 30 degrees and the highest value was found on the Bernal stacked BLG. The obtained kappa is further found to be sensitive to the Moire periodicity but insensitive to the commensurate lattice constant of the twisted BLG. The non-equilibrium molecular dynamics simulation reveals that the twist angle in t-BLG affects the proportion of low-frequency phonons and finally changes the kappa. The quantitative study validates the regulation of thermal conduction through the interlayer twist angle and favors the further understanding of thermal transport in the van der Waals bilayer systems.