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Spin properties of quantum wells with magnetic barriers. I. A k center dot p analysis for structures with normal band ordering
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
2002 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 66, no 15Article in journal (Refereed) Published
Abstract [en]

The electronic band-edge spectrum of magnetic semiconductor quantum wells containing a diluted magnetic semiconductor as one of the constituents is studied within the envelope-function formalism. The effects of Mn d electrons are explicitly included in a k.p Hamiltonian which in the first approximation of perturbation theory is shown to be reduced to an effective Kane model. The sp-d hybridization leads to a spin-splitting effect. The results are applied to the system Cd1-xMnxTe/CdTe. The spin-splitting effect is studied as a function of external magnetic field, well width, valence band offset and fraction of the magnetic atoms. The numerical results are in accord with experimental data.

Place, publisher, year, edition, pages
2002. Vol. 66, no 15
Keyword [en]
znse/zn1-xmnxse heterostructure, semiconductor heterostructure, electronic-structure, polarized transport, injection, superlattices, exchange, field
URN: urn:nbn:se:kth:diva-22024DOI: 10.1103/PhysRevB.66.155324ISI: 000179080800103OAI: diva2:340722
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Ekenberg, Ulf
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Microelectronics and Information Technology, IMIT
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