Maximizing phonon thermal conductance for ballistic membranes

Details Maximizing phonon thermal conductance for ballistic membranes Maximizing phonon thermal conductance for ballistic membranes

2007-10-05

arxiv.org/abs/0710.1195v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, proceedings to phonons 2007 conference

Scientific paper

10.1088/1742-6596/92/1/012082

At low temperatures, phonon scattering can become so weak that phonon transport becomes ballistic. We calculate the ballistic phonon conductance G for membranes using elasticity theory, considering the transition from three to two dimensions. We discuss the temperature and thickness dependence and especially concentrate on the issue of material parameters. For all membrane thicknesses, the best conductors have, counter-intuitively, the lowest speed of sound.

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