Heat fluctuations and phonon hydrodynamics in nanowires

D. Jou, M. Criado-Sancho, J. Casas-Vázquez

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20 Citations (Scopus)

Abstract

We evaluate the second moments of the fluctuations of the total longitudinal heat flux in cylindrical nanowires described by phonon hydrodynamics with boundary conditions accounting for phonon boundary collisions. It is found that the second moments exhibit an explicit dependence on the boundary conditions and, therefore, may provide a suitable tool for analyzing phonon boundary collisions. Furthermore, an analogous dependence is also manifested in the relative probability of forward and backward fluctuations of the heat flux in a nonequilibrium steady state, thus providing a complementary tool of research for phonon boundary collisions. © 2010 American Institute of Physics.
Original languageEnglish
Article number084302
JournalJournal of Applied Physics
Volume107
DOIs
Publication statusPublished - 15 Apr 2010

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