Minimum thermal conductivity of superlattices

  title={Minimum thermal conductivity of superlattices},
  author={Simkin and Mahan},
  journal={Physical review letters},
  volume={84 5},
The phonon thermal conductivity of a multilayer is calculated for transport perpendicular to the layers. There is a crossover between particle transport for thick layers to wave transport for thin layers. The calculations show that the conductivity has a minimum value for a layer thickness somewhat smaller then the mean free path of the phonons. 
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