Abstract
AbstractThe thermal conductivity of laminated GaSe monocrystals is studied in two crystallographic directions between 90 and 600 °K. The thermal conductivity is highly anisotropic; the value in the direction parallel to the layers exceeds that in the direction perpendicular to the layers by almost an order of magnitude. The mean free path of the acoustic phonons is calculated on the basis of the experimental lattice thermal conductivity, sound velocity and heat capacity data. The mean free path in the direction perpendicular to the layers (\documentclass{article}\pagestyle{empty}\begin{document}$ l\frac{1}{{{\rm ph}}} = 15.8 \times {\rm 10}^{{\rm - 8}} {\rm cm} $\end{document}) is found to be limited to the thickness of the Se—Ga—Ga—Se quadruple layers corresponding in this case to the lattice parameter (c = 15.883 Å). The mean free path in the direction parallel to the layers (l = 65 × 10−8 cm) exceeds the corresponding parameter (a = 3.734 Å) by an order of magnitude. Heat transfer by internal electromagnetic radiation is found in the high temperature region. A study is made of the effect of unilateral compression in the direction of the weak van der Waals bond (0001) both on the lattice and the photon components of the thermal conductivity of GaSe monocrystals.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.