Author: John Peter, A.

Source: Journal of Computational and Theoretical Nanoscience, Volume 5, Number 12, December 2008 , pp. 2396-2421(26)

Publisher: American Scientific Publishers

Abstract:

This review describes the progress in finding out the impurity states of donors in the ground and excited states in a diluted magnetic quantum dot with external perturbations. Spin polaronic shifts are estimated using a mean field theory and the magnetization is calculated for various concentrations of Mn²⁺ ions with the dot sizes. Significant magnetization of the Mn-spins can be obtained through the formation of polarized exciton magnetic polarons. We concentrate on the magnetic properties, in particular the exchange mechanism which controls the ferromagnetism in these systems. A technology has emerged called spintronics (spin transport electronics or spinbased electronics), where it is not the electron charge but the electron spin that carries information, and this offers opportunities for a new generation of devices combining standard microelectronics with spin-dependent effects that arise from the interaction between pin of the carrier and the magnetic properties of the material. We review the current state of the spin-based devices, efforts in new materials fabrication, and issues in spin transport and spin manipulation.

Keywords: SPIN POLARON; DONOR BINDING; QUANTUM DOT; SEMIMAGNETIC SYSTEM; CD1-XIN MNXIN TE/CD1-XOUT MNXOUT TE

Document Type: Review article

DOI: http://dx.doi.org/10.1166/jctn.2008.1206

Publication date: 2008-12-01

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• Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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