Investigation of peculiarities in the temperature dependence of the thermal conductivity of Pbl2 and ln4Se3 layer crystals at low temperatures
E. AndersPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRI. V. VolchokPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRB. Ya. SukharevskiǐPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Annotatsiya
Results are presented of the experimental investigation of the thermal conductivity of Pbl2 and In4Se3 single crystals parallel to the plane of the layers in the temperature range 2–30°K. The ranges of influence of Umklapp and boundary scattering processes on the phonon thermal conductivity have been determined. It is shown that in the first range (above 10°K) a peculiarity in the phonon spectrum of the quasi-two-dimensional structures, namely, the presence of a bending branch, is manifest; in the second range (below 4°K) phonon scattering on block boundaries proceeds in the same way as in three-dimensional crystals.
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