Ming L. Yu
Physical Review B
The linearized Peierls equation for the phonon density N(kλ, rt) is solved by replacing the collision operator in the subspace orthogonal to the collision invariants by k-dependent relaxation rates. For the normal process relaxation time the behavior τN(kλ)∝| k|−p for small k is assumed. Taking into account this k-dependence of τN explicitly and avoiding an expansion with respect to ΩτN(kλ) before performing the necessary integration over k yields new, non-analytic, terms in the hydrodynamic equations describing second sound and Poiseuille flow. It is shown that this may lead to a temperature dependence of second sound damping and thermal conductivity in the Poiseuille flow region differing from the usual theoretical predictions and in better agreement with experiments. © 1975, Springer-Verlag. All rights reserved.
Ming L. Yu
Physical Review B
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Surface Science
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SPIE Optical Materials for High Average Power Lasers 1992
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SCML 2024