Characterization and measurement of a nonequilibrium temperature-like variable in irreversible thermodynamics

Roberto Luzzi, Áurea R. Vasconcellos, Jose Casas-Vazquez, David Jou

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44 Citations (Scopus)

Abstract

The question of the definition and measurement of nonequilibrium temperature is considered. Its characterization in the framework of an informational statistical thermodynamics is done, and its dependence on the irreversible fluxes that develop in systems out of equilibrium is proved. A particular analysis for the case of a highly photoexcited plasma in semiconductors is presented, where the nonequilibrium temperature of the carriers, usually referred to as the carriers' quasi-temperature, can be measured in experiments of modulation optical spectroscopy. Comparison of theory and experimental data seems to point to a corroboration of the identification of the nonequilibrium temperature with the quasi-temperature as well as its dependence on the energy flux, as predicted by the phenomenological and statistical thermodynamic theories.
Original languageEnglish
Pages (from-to)699-714
JournalPhysica A: Statistical Mechanics and its Applications
Volume234
Issue number3-4
DOIs
Publication statusPublished - 1 Jan 1997

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