Abstract
A new method for the calculation of the electronic structure of semiconductor superlattices in the envelope-function approximation is presented. The method is particularly suited to a description of type-II superlattices (e.g. InAs - GaSb). The band-edges of the constituent materials are realistically described, and appropriate boundary conditions are derived from the envelope functions. To determine the energy levels, a variational principle is obtained, which automatically produces correctly matched solutions and reduces the numerical work to a standard matrix diagonalization. Results are presented for InAs-GaSb superlattices. They reveal novel aspects of the band-crossing transition which occurs with increasing superlattice period and which produces a zero-gap or very-narrow-gap semiconductor state, rather than a true semimetal.
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© 1983 Springer-Verlag
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Altarelli, M. (1983). Electronic structure of semiconductor superlattices. In: Landwehr, G. (eds) Application of High Magnetic Fields in Semiconductor Physics. Lecture Notes in Physics, vol 177. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-11996-5_24
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DOI: https://doi.org/10.1007/3-540-11996-5_24
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