Open AccessО природе аномальной температурной зависимости коэффициента Холла, наблюдающейся в полупроводниковых кристаллах твердых растворов Bi-=SUB=-2-=/SUB=-Te_3-Sb-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=-
Author(s) -
Н. П. Степанов
Publication year - 2020
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2020.01.48761.8890
Subject(s) - conductivity , electrical resistivity and conductivity , condensed matter physics , materials science , analytical chemistry (journal) , chemistry , physics , quantum mechanics , chromatography
Based on the analysis of the results of experimental studies, it is shown that in crystals Bi2Te3-Sb2Te3, in which the amount of electrical conductivity at 4.2 K exceeds 1.5•106 Cм/м , a certain process is being intensified to increase electrical conductivity in the range of 4.2 to 15 K. Subsequent decrease in the amount of electrical conductivity with a temperature increase from 15 K and before the beginning of the dominance of its own conductivity, accompanied by an abnormal increase in the coefficient Hall may be partly due to the decrease in the intensity of the process. It is suggested that in the conditions of convergence of plasma energy and the width of the prohibited zone, the influence of plasmon-phonon-polaritones can provide the opposite effect polarization that forms the basis of this process.