Transport phenomena in vapor-phase PbTe-Bi<sub>2</sub>Te<sub>3</sub> condensate on mica substrates
Keywords:
vapor-phase PbTe-Bi2Te3 condensate, mica substrate, thermoelectric parameters of surface layersAbstract
Dependences of the structural characteristics and electrical properties of thin films of solid solutions PbTe-Bi2Te3containing 1, 3, 5 mоl. % Bi2Te3, deposited in open vacuum for fresh chips (0001) of mica muscovite, on their thickness d=(0.1–1) microns were studied. The effective mean free path of charge carriers was detected and the dominant scattering mechanism was determined. Within the two-layer Petritz model an estimation the thermoelectric parameters extent of surface layers was carried out. It has been found that the condensate has stable n-type conductivity and there is diffuse scattering on the surface, which leads to a significant decrease in relation to the films volume for mobility, conductivity, and increasing Seebeck efficient.References
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