Nonequilibrium temperatures and second-sound propagation along nanowires and thin layers

D. Jou, V. A. Cimmelli, A. Sellitto

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)


It is shown that the dispersion relation of heat waves along nanowires or thin layers could allow to compare two different definitions of nonequilibrium temperature, since thermal waves are predicted to propagate with different phase speed depending on the definition of nonequilibrium temperature being used. The difference is small, but it could be in principle measurable in nanosystems, as for instance nanowires and thin layers, in a given frequency range. Such an experiment could provide a deeper view on the problem of the definition of temperature in nonequilibrium situations. © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)4386-4392
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Publication statusPublished - 23 Nov 2009


  • Dynamical nonequilibrium temperature
  • Newton cooling law
  • Phase speed
  • Silicon nanowires
  • Thermal waves


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