Abstract
We present a simple chain model for ballistic-diffusive heat transfer in heterogeneous nanostructures connected by atomistic interfaces, which are under extensive investigation for nanoscale heat transfer control. Heat transfer in typical heterogeneous nanostructures, including junctions with a single interface, multi-layered SiGe-Si systems, and nanocrystal arrays, can be well reproduced by the model. Good performance of the model in all the investigated cases shows that it captures the essential feature of interfaces connecting ballistic and diffusive thermal conducting regions. This will help to design tunable thermal transport devices and to further clarify the origin of interfacial resistance.
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