4.6 Article

Dislocation strain as the mechanism of phonon scattering at grain boundaries

期刊

MATERIALS HORIZONS
卷 3, 期 3, 页码 234-240

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ROYAL SOC CHEMISTRY
DOI: 10.1039/c5mh00299k

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  1. Solid-State Solar-Thermal Energy Conversion Center (S3TEC), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0001299]
  2. Samsung Advanced Institute of Technology (SAIT)

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Thermal conductivities of polycrystalline thermoelectric materials are satisfactorily calculated by replacing the commonly used Casimir model (freqeuncy-independent) with grain boundary dislocation strain model (frequency-dependent) of Klemens. It is demonstrated that the grain boundaries are better described as a collection of dislocations rather than perfectly scattering interfaces.

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