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Published September 1987 | public
Journal Article Open

Theoretical studies of electronic properties of semimagnetic superlattices in a magnetic field

Abstract

We present our first theoretical study of the electronic properties of superlattices formed from semimagnetic semiconductors. Both Cd0.8Mn0.2Te/Cd0.7Mn0.3Te and Hg0.95Mn0.05Te/ Cd0.78Mn0.22Te systems are considered explicitly. Magnetic field splittings are calculated with and without the exchange interaction. We find that the exchange interaction dominates the magnetic effects in the wide-gap Cd0.8Mn0.2Te/Cd0.7Mn0.3Te system while the Landau level shift is also important in the Hg0.95Mn0.05Te/ Cd0.78Mn0.22Te system. We present calculations of the superlattice band-gap variation with temperature and its derivative with magnetic field as a function of the superlattice layer thickness. Variation of the band offset in determining the values of the various quantities is examined.

Additional Information

© 1987 American Vacuum Society (Received 15 December 1986; accepted 7 April 1987) Two of the authors (G.Y.W. and T.C.M.) would like to acknowledge the support of the Army Research Office under Contract No. DAAG-29-83-K-0104. The work of D.L.S. was supported by Los ALamos National Laboratory Internal Supporting Research.

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August 22, 2023
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