Kapitza conductance of silicon-amorphous polyethylene interfaces by molecular dynamics simulations

    Authors

    M. Hu; P. Keblinski;P. K. Schelling

    Comments

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    Abstract

    We use nonequilibrium molecular dynamics simulation to elucidate the interfacial thermal conductance between single-crystal silicon and amorphous polyethylene. In particular, we investigate the role of solid stiffness and the bonding strength across the interface on the interfacial thermal conductance. Simulations of interfacial scattering of individual phonon wave packets indicate that neither diffuse mismatch model nor acoustic mismatch model describes the interfacial scattering process quantitatively. In general, transmission coefficients for longitudinal phonons are significantly higher than those for transverse phonons. We also observe that anharmonic processes can be important for interfacial conductance.

    Journal Title

    Physical Review B

    Volume

    79

    Issue/Number

    10

    Publication Date

    1-1-2009

    Document Type

    Article

    WOS Identifier

    WOS:000264768600055

    ISSN

    1098-0121

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