Abstract
We present a calculation of the Zeeman splitting of the light- and heavy-hole excitons that takes into account the uniaxial strain due to lattice mismatch as well as the interface-enhanced paramagnetism. In the CdTe quantum well, the strain raises the light-hole band edge with respect to the heavy-hole one. The shallower well allows a larger penetration of the Cd 1− x Mn x Te barrier region by the light hole. This adds to the effect of the lighter effective mass, leading to an “anomalous” enhancement of the Zeeman splitting of the light-hole exciton. We find that the ratio of the light- to heavy-hole exciton splitting (between the σ − and σ + components) increases with the quantum well width eventually exceeding unity, in agreement with experimental data.
Published Version
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