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

Wu, G. Y. and McGill, T. C. and Smith, D. L. and Mailhiot, C. (1987) Theoretical studies of electronic properties of semimagnetic superlattices in a magnetic field. Journal of Vacuum Science and Technology B, 5 (5). pp. 3096-3101. ISSN 1071-1023. http://resolver.caltech.edu/CaltechAUTHORS:WUGjvsta87

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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.


Item Type:Article
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.
Subject Keywords:SUPERLATTICES; ENERGY–LEVEL SPLITTING; MAGNETIC FIELDS; MAGNETIC FIELD EFFECTS; ELECTRONIC STRUCTURE; ENERGY GAP; BAND STRUCTURE; CADMIUM TELLURIDES; MANGANESE TELLURIDES
Record Number:CaltechAUTHORS:WUGjvsta87
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:WUGjvsta87
Alternative URL:http://dx.doi.org/10.1116/1.574224
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4741
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:05 Sep 2006
Last Modified:26 Dec 2012 09:01

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