CONTRIBUTION OF RESONANT STATES TO THE CONDUCTIVITY OF HGTE

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 × 1018 to 7 × 1018 cm−3. A significant contribution of the low‐mobility electrons (μ < 5 × 103 cm2/Vs) to the conduction is established. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA