Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3514252
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- Purdue University
- School of Mechanical Engineering, Purdue University
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In this work, we use molecular dynamics simulations to predict the thermal conductivities of perfect and nanoporous few-quintuple Bi2Te3 thin films. We find the dimensional crossover behavior of thermal transport and a minimum thermal conductivity at three quintuple layers at room temperature, and we attribute it to the interplay between phonon Umklapp scattering and boundary scattering. Also, nanoporous films show significantly reduced thermal conductivity compared to perfect thin films, indicating that they can be very promising thermoelectric materials. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3514252]
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