Control the transport of phonon in a broad frequency range in low dimensional materials

由于VdW异质结构层间相互作用弱，叠加顺序交替产生的无序性突出，是实现低导热的理想材料。本文首次将vdW异质结构中的热传导分解到单个声子的极化水平，并利用其入射角来阐明声子干涉和声子隧穿在vdW异质结构中的作用。

VdW heterostructures are an ideal candidate to realize low thermal conductivity in their through-thickness direction due to its weak interlayer interactions and prominent disorder by alternating stacking orders. Herein, for the first time, heat conduction in vdW heterostructures are resolved to the level of individual phonon polarizations, whose incident angles are utilized to elucidate the role that phononinterference and phonon tunneling play in vdW heterostructures.