The temperature dependence of the thermopower of the InSb Corbino disc in a quantizing magnetic field

Thermopower of the Corbino disc made of InSb with n ₇₇ = 2 × 10¹⁴ cm^?3 in a transverse magnetic field as high as 30 kOe at temperatures of 60, 67, and 80 K is studied. It is established that the diffusion fraction of thermopower in a quantizing magnetic field rises according to the power law H ^2.2 at all mentioned temperatures. By the magnitude of saturation thermopower α_xx(∞) in a high field, the scattering mechanism of charge carriers is determined. It is established that in a temperature region of 60–80 K, the electrons are scattered by acoustic phonons.