Band structure of semimagnetic Hg1-yMnyTe quantum wells -: art. no. 035321

The band structure of semimagnetic Hg1-yMnyTe/Hg1-xCdxTe type-III quantum wells (QW's) has been calculated using an eight-band k(.)p model in an envelope function approach. Details of the band structure calculations are given for the Mn-free case (y=0). A mean-field approach is used to take the influence of the sp-d exchange interaction on the band structure of QW's with low Mn concentrations into account. The calculated Landau level fan diagram and the density of states of a Hg0.98Mn0.02Te/Hg0.3Cd0.7Te QW are in good agreement with recent experimental transport observations. The model can be used to interpret the mutual influence of the two-dimensional confinement and the sp-d exchange interaction on the transport properties of Hg1-yMnyTe/Hg1-xCdxTe QW's.