Mode-Resolved Phonon Transport in Twisted Graphene

The influence of rotation angle on interlayer thermal transport in twisted graphene was investigated through mode-resolved atomistic Green’s function. Thermal conductance exhibits a strong dependence on rotation angle, with the highest value at 0° and the lowest at 10°. Spectral transmission shows that twisted structures suppress high-frequency phonons (6–16 THz), while the untwisted case maintains higher transmission in low-frequency range (0–6 THz). Mode-resolved results reveal that out-of-plane polarized phonons dominate interlayer heat conduction, whereas moiré-induced reconstruction hinders non-out-of-plane mode channels and enhances the relative contribution of out-of-plane phonon modes. Furthermore, incidence-angle-dependent transmission demonstrates that twisting particularly suppresses phonons with large incidence angles at high frequencies, and a distinct envelope pattern emerges at 30°. These findings highlight that twist angle effectively regulates phonon transmission pathways and interlayer thermal conductance, offering a practical approach for tuning heat transport in two-dimensional layered materials.