Application of pseudopotential theory to magnetic semiconductor heterostructures |
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Institution: | 1. Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, USA;2. Department of Material Science and Engineering, University of California, Berkeley, CA 94720-1760, USA;3. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA |
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Abstract: | The results of empirical pseudopotential calculations for the semiconductor compound Cd1 ? xMnxTe are presented. The effective electron and hole masses obtained from the pseudopotential calculations are then employed in an envelope function approximation, using two different effective mass Hamiltonians to evaluate the transition energies of the excitonic ground state in CdTe– Cd1 ? xMnxTe quantum wells of variable width. It is shown that in non-magnetic systems it is not possible to utilize exciton energies alone to either distinguish between different model Hamiltonians or to quantify the interface roughness. However, it is shown that the latter can be quantified in magnetic systems via the resulting Zeeman effect. |
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