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PHYSICAL REVIEW B 89, 144303 (2014). Thermal conductivity accumulation in amorphous silica and amorphous silicon Jason M. Larkin and Alan J. H. McGaughey*. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA. (Received 22 August 2013; revised manuscript received 25 March 2014; published 14 April 2014). We predict the properties of the propagating and nonpropagating vibrational modes in amorphous silica (a-SiO2 ) and amorphous silicon (a-Si) and, from them, Thermal conductivity accumulation functions. The calculations are performed using molecular dynamics simulations, lattice dynamics calculations, and theoretical models. For a-SiO2 , the propagating modes contribute negligibly to Thermal conductivity (6%), in agreement with the Thermal conductivity accumulation measured by Regner et al.
PHYSICAL REVIEW B 89, 144303 (2014) Thermal conductivity accumulation in amorphous silica and amorphous silicon Jason M. Larkin and Alan J. H. McGaughey* Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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