Size-dependent model for thin film and nanowire thermal conductivity

By A. McGaughey, E. Landry, D. Sellan, Cristina H. Amon. 2011

140 citations recorded by the source corpus.

We present an analytical model for the size-dependence of thin film and nanowire thermal conductivity and compare the predictions to experimental measurements on silicon nanostructures. The model contains no fitting parameters and only requires the bulk lattice constant, bulk thermal conductivity, and an acoustic phonon speed as inputs. By including the mode-dependence of the phonon lifetimes resulting from phonon-phonon and phonon-boundary scattering, the model captures the approach to the bulk thermal conductivity of the experimental data better than gray models based on a single lifetime.

Subfields: Civil and Structural Engineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/12a6893a9e4a3fe5a4e17fce77b9242e6f55d581

Citations in the corpus

• Phonon hydrodynamics and its applications in nanoscale heat transport (2015, unknown): “where ‘a’ denotes the anharmonic phonon scattering [58,121,280,281] (or Umklapp three-phonon scattering process [76,119,120,122]).”