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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Subband structure of II-VI modulation-doped magnetic quantum wells

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Author(s):
Henrique J. P. Freire [1] ; J. Carlos Egues [2]
Total Authors: 2
Affiliation:
[1] Universidade de São Paulo. Instituto de Física de São Carlos. Departamento de Física - Brasil
[2] Universidade de São Paulo. Instituto de Física de São Carlos. Departamento de Física - Brasil
Total Affiliations: 2
Document type: Journal article
Source: Brazilian Journal of Physics; v. 32, p. 327-330, 2002-06-00.
Abstract

Here we investigate the spin-dependent subband structure of newly-developed Mn-based modulation-doped quantum wells. In the presence of an external magnetic field, the s-d exchange coupling between carriers and localized d electrons of the Mn impurities gives rise to large spin splittings resulting in a magnetic-field dependent subband structure. Within the framework of the effective-mass approximation, we self-consistently calculate the subband structure at zero temperature using Density Functional Theory (DFT) with a Local Spin Density Approximation (LSDA). We present results for the magnetic-field dependence of the subband structure of shallow ZnSe/ZnCdMnSe modulation doped quantum wells. Our results show a significant contribution to the self-consistent potential due to the exchange-correlation term. These calculations are the first step in the study of a variety ofinteresting spin-dependent phenomena, e.g., spin-resolved transport and many-body effects in polarized two-dimensional electron gases. (AU)

FAPESP's process: 99/06868-3 - Spin-dependent physics in Mn-based heterostructures and related topics
Grantee:Henrique Jota de Paula Freire
Support Opportunities: Scholarships in Brazil - Doctorate