Thermal Transport Across Slippery Interfaces in Twisted Graphite

Interlayer rotation in van der Waals (vdW) materials offers a unique degree of freedom for manipulating phonon dynamics and heat flow in advanced electronics. However, precise measurement of single-crystalline twisted interfaces presents a great challenge, and the underlying physical mechanisms thus remain elusive. Here, we develop micro-mesa-based experimental schemes and achieve simultaneous mechanical and thermal characterizations of the intrinsic interfaces in graphite. Remarkably, we observe over 30-fold suppression of thermal conductance for the slippery interfaces with low sliding resistance compared to locked interfaces. Nonetheless, the conductance remains ~600 MWm^-2K^-1, approaching the highest values ever measured for any interface. Atomic simulations reveal the predominant role of transverse acoustic phonons. Together, our findings directly highlight a general force-heat correlation and lay the foundation for twist-enabled thermal management which are particularly beneficial to twistronics and slidetronics.