Effects of subconduction band excitations on thermal conductance at metal-metal interfaces

Hopkins, Patrick E.; Beechem, Thomas E.; Duda, John C.; Smoyer, Justin L.; Norris, Pamela M.
January 2010
Applied Physics Letters;1/4/2010, Vol. 96 Issue 1, p011907
Academic Journal
Increased power densities combined with the decreased length scales of nanosystems give rise to large thermal excitations that can drastically affect the electron population near the Fermi surface. In light of such conditions, a model is developed for electron thermal boundary conductance (eTBC) that accounts for significant changes in the electron and hole populations around the Fermi level that occur at heightened temperatures. By including the contribution of subconduction band electrons to transport and evaluating the transmission coefficient based upon the total number of available states, an extension of eTBC predictions to high temperatures is made possible.


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