Abstract
The Shubnikov-de Haas effect of n-type HgTe was observed below 4.2°K. From the analysis of oscillations of the said effect, two kinds of period were found, which may be ascribed to the participation of two kinds of electrons with different effective masses in an electric conduction, and also it was revealed that the Fermi surfaces of these electrons are both nearly spherical. The effective mass of one kind of electrons deduced from the effect in the weak magnetic field range was estimated at (0.027±0.001) m , m being the electron rest mass. This value is in good agreement with that reported by others from the assumption of a single conduction band. However, we arrived at the conclusion, by taking into account the results in the strong field range, that there should be two kinds of conduction bands. The temperature variation of Hall coefficient seems to show that there is no thermal energy gap in the band structure of HgTe.
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