Phonon participation in superlattice heat transport

Phonon spectra as well as thermodynamic characteristics of superlattices are analyzed using the method of two-time temperature Green's functions. The phonon dispersion law is found in "cut-off" case. Internal energy of the system, as well as specific heat and coefficient of thermal co...

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Published in2004 24th International Conference on Microelectronics (IEEE Cat. No.04TH8716) Vol. 1; pp. 275 - 278 vol.1
Main Authors Jacimovski, S.K., Sajfert, V.D., Ranitovic, P., Setrajcic, J.P., Rakovic, D.I.
Format Conference Proceeding
LanguageEnglish
Published Piscataway NJ IEEE 2004
Subjects
Applied sciences
Compound structure devices
Conductive films
Electronics
Equations
Exact sciences and technology
Green's function methods
Nearest neighbor searches
Phonons
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superlattices
Temperature dependence
Thermal conductivity
Thermodynamics
Transistors
Specific heat
Temperature dependence
Temperature coefficient
Thermodynamic model
Phonon
Temperature effect
Thermal conductivity
Green function
Superlattice
Thin film
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Summary:Phonon spectra as well as thermodynamic characteristics of superlattices are analyzed using the method of two-time temperature Green's functions. The phonon dispersion law is found in "cut-off" case. Internal energy of the system, as well as specific heat and coefficient of thermal conductivity are determined. The temperature dependence coefficient of thermal conductivity of a superlattice is compared to ones of bulk structures and thin films. It has been shown that, at extremely low temperatures, superlattice and film coefficient of thermal conductivity are practically equal and in the same time considerably lower than the specific heat of bulk sample.
ISBN:0780381661
9780780381667
DOI:10.1109/ICMEL.2004.1314616