DOI: https://doi.org/10.30970/jps.11.285
CONTRIBUTION OF "DIFFUSIVE" MODES TO ISOCHORIC THERMAL CONDUCTIVITY OF RARE GAS CRYSTALS
O. I. Pursky
Technological State University of Cherkasy
460 Shechenko Blvd., Cherkasy UA-18006, Ukraine
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Journal of Physical Studies 11(3), 285–288 (2007)
DOI: https://doi.org/10.30970/jps.11.285 CONTRIBUTION OF "DIFFUSIVE" MODES TO ISOCHORIC THERMAL CONDUCTIVITY OF RARE GAS CRYSTALSO. I. Pursky
Technological State University of Cherkasy |
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Isochoric thermal conductivity of rare gas solids is analyzed within Debye approximation. The temperature dependences of isochoric thermal conductivity of solid Ar, Kr, and Xe are explained in the framework of a model where heat is transferred by phonons and above phonon mobility edge by "diffusive" modes migrating randomly from site to site. The mobility edge $ω _{{\rm 0}}$ is determined from the condition that the phonon mean free path restricted by the Umklapp processes cannot become smaller than half the phonon wavelength.
PACS number(s): 66.70.+f, 63.20.Ls