Influence of structural defects on the thermal conductivity of polycrystalline and single-crystal PbTe |
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| Authors: | G. Z. Bagieva G. M. Murtuzov G. D. Abdinova E. A. Allakhverdiev D. Sh. Abdinov |
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| Affiliation: | (1) Institute of Technical Sciences SASA, Knez Mihajlova 35/IV, 11000 Belgrade, Serbia;(2) Solid State Section, Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;(3) Institute for Multidisciplinary Research, Kneza Viseslava 1, 11000 Belgrade, Serbia;(4) Faculty of Electrical Engineering, University of Belgrade, Bulevar kralja Aleksandra 73, 11000 Belgrade, Serbia |
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| Abstract: | We have measured the thermal conductivity of unannealed and annealed (800 K, 120 h) polycrystalline and single-crystal PbTe samples at temperatures from 80 to 303 K, evaluated the electronic and lattice components of their thermal conductivity, and determined the thermal resistivity due to structural defects, whose concentration in the unannealed single-crystal samples reaches ∼1017 cm−3. The results demonstrate that the thermal resistivity of the unannealed polycrystalline and single-crystal samples is 9.4 and 1.7 cm K/W, respectively. Annealing eliminates the defects, thereby increasing the lattice thermal conductivity of the material. |
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