Physical science of materials

Effect of dislocations on heat transfer in germanium

O. V. Malyshkina^a, I. A. Kaplunov^a, P. V. Mamaev^a, V. E. Rogalin^b, G. I. Kropotov<sup>c

a</sup> Tver State University
^b Institute of Problems of Electrophysics of the Russian Academy of Sciences, St. Petersburg
^c Tydex LLC, St. Peterburg

Abstract: Comparative studies of the thermal characteristics of the germanium single crystals with dislocations and dislocation-free germanium in the dynamic mode of passage of a temperature wave through a sample were carried out. It is shown that samples of dislocation-free germanium have a higher thermal conductivity coefficient (by 18% in the crystallographic direction $\langle$100$\rangle$ and by 9% in the direction $\langle$111$\rangle$) compared to samples of germanium with dislocations. At the same time, the difference in the values of the thermal diffusivity coefficients of germanium samples with dislocations and dislocation-free is insignificant.

Keywords: crystalline germanium, dislocation-free single-crystal germanium, thermal conductivity, thermal diffusivity, TSW method for studying thermal characteristics.

Received: 23.01.2025
Revised: 25.05.2025
Accepted: 27.05.2025

DOI: 10.61011/JTF.2025.11.61599.10-25

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