The Valence Band Structure of Tellurium. III. The Landau Levels

Abstract

The Landau levels are calculated for two upper valence bands of tellurium. The peak positions and intensities of the cyclotron resonance and of the inter-valence band magneto-absorption are calculated. Effects of the k -linear terms on them are elucidated. For the magnetic field perpendicular to the c -axis, the Landau levels of the uppermost valence band are doubly degenerate at low magnetic fields and split as the field increases, while those of the lower band are equally spaced but bend downwards at high fields. The peaks in the magneto-absorption are all identified as the harmonic transitions. The agreement with the experiments is satisfactory, and all the band parameters are determined. It is shown that the k -linear terms make the anisotropy of the effective masses opposite for the two bands.