Open AccessТемпературная зависимость проводимости нитевидных кристаллов теллура
Author(s) -
М.Р. Рабаданов,
А.А. Степуренко,
А.Э. Гумметов,
А.М. Исмаилов
Publication year - 2021
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2021.06.50913.9631
Subject(s) - tellurium , whiskers , whisker , materials science , electrical resistivity and conductivity , scanning electron microscope , atmospheric temperature range , single crystal , conductivity , crystal (programming language) , surface conductivity , scattering , optics , chemistry , composite material , crystallography , metallurgy , physics , thermodynamics , quantum mechanics , computer science , programming language
In the temperature range 77−273K, a comparative analysis of the electrical conductivity of a whisker, an epitaxial film, and a single crystal of tellurium was undertaken. The electrical conductivity of the film and the single crystal increased monotonically up to 200K, then began to rise steeply, corresponding to thermal excitation of intrinsic carriers. The electrical conductivity of whiskers decreased with increasing temperature to 230K, after which it began to increase more gradually. It is assumed that in the case of tellurium whiskers, the classical size effect took place: the decrease in electrical conductivity was due to diffuse scattering of carriers by the lateral surface of the tellurium crystal and was intensified with increasing temperature. The uneven, tightly-convoluted surface of the samples was shown in imagesproduced in a scanning electron microscope in the nanometer range.