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Contribution of resonant states to the conductivity of HgTe
Author(s) -
Szlenk K.,
Dziuba Z.,
Galazka R. R.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220910127
Subject(s) - conductivity , acceptor , electron , thermal conduction , magnetic field , conduction band , condensed matter physics , atmospheric temperature range , range (aeronautics) , chemistry , materials science , analytical chemistry (journal) , physics , thermodynamics , quantum mechanics , chromatography , composite material
Measurements of the Hall effect and conductivity are performed on HgTe in the temperature range 4 to 40 K and magnetic field up to 70 kG. The analysis of conductivity tensor versus magnetic field enables to establish the influence of different types of carriers on the total conductivity. The concentration of the conduction band electrons versus temperature is determined from the low magnetic field experimental data. By comparing this dependence with the theoretical one the position and concentration of discrete acceptor levels are determined. It is found that the energy of the acceptor level decreases from 2.3 to 1.7 meV when the acceptor concentration increases from 2 × 10 18 to 7 × 10 18 cm −3 . A significant contribution of the low‐mobility electrons (μ < 5 × 10 3 cm 2 /Vs) to the conduction is established.