Conduction Band Structure of Cd0.1Hg0.9Te

The Hall coefficient R H and the conductivity σ are measured in the temperature range 4.2 to 300 °K. The thermoelectric power α as a function of the magnetic field and temperature are measured in the range 100 to 300 °K. The value of the effective mass m ast; is calculated from these measurements for electron concentrations from 6.25 × 10 16 to 2.71 × 10 18 cm −3 . The dependence of the effective mass m ast; on k is interpreted according to Kane's model of the conduction band structure. The best agreement is obtained for values of the parameters ε 0 = εΓ 6 – εΓ 8 = −0.00 eV and the coupling constant Q = 12 eV, that is for a linear ε vs. k dependence. The mobility of the electrons as a function of concentration and temperature is also analyzed. For temperatures below 77 °K impurity scattering is dominant. Within the temperature range 77 to 300 °K the best agreement between theory and experiment is obtained for mixed ionic and optical phonon scattering.