Physics of the Solid State
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- 2022
Thermal Conductivity of Single-Crystals Isotopically Enriched 70Ge, 72Ge, 74Ge in the Temperature Range of 80-310 K
Gibin A.M.
1, Abrosimov N.V.
2, Bulanov A.D.1, Gavva V.A.
1
1Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhny Novgorod, Russia
2Leibniz-Institut fur Kristallzuchtung (IKZ), Berlin, Germany
2Leibniz-Institut fur Kristallzuchtung (IKZ), Berlin, Germany
Email: gibin@ihps-nnov.ru
The temperature dependence of the thermal conductivity kappa(T) of single crystals isotopically enriched 70Ge (99.926%), 72Ge (99.980%), 74Ge (99.921%) has been measured in the temperature range 80-310 K. In the studied temperature range, the thermal conductivity is determined by anharmonic processes of phonon scattering; a decrease in the thermal conductivity with increasing mass of the germanium isotope is experimentally observed. Keywords: thermal conductivity, single-crystal, germanium isotope, isotopically enriched, isotope effect, thermal resistance. DOI: 10.61011/PSS.2023.08.56589.65
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