Uniaxial Stress Effect of Magneto-Optical Properties of HgTe

The \(₈\)-\(₈\) interband magneto-absorptions in HgTe were measured using two far-infrared lasers (118 µm and 337 µm) under a uniaxial compressional stress.The stress was applied parallel to the magnetic field and to each of the principal crystallographic directions [001] and [111]. The experimental results show that the level inversion occurs between the lowest Landau levels of the conduction and the valence band by increasing the magnetic field for the case of the compressional stress. The observed resonance peaks were analyzed by using the effective mass theory. The shear deformation potentials of the \(₈\) bands have been obtained as D u =1.9±0.6 eV and D u '=1.8±0.2 eV.