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Binding Energies of Ground and Excited States of Shallow Donors in Semimagnetic Parabolic Quantum Dots

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Abstract:

The theoretical study of ground state and a few excited state energies of a hydrogenic donor in a spherical quantum dot are computed for the quantum dots of Cd1−xinMnxinTe/Cd1−xoutMnxoutTe. A variational procedure within the effective mass approximation is employed in the presence of magnetic field. The results are presented for 1s, 1p and 1d states Spin polaronic shifts are estimated using a mean field theory. The results show that spin polaronic shift (i) decreases as the magnetic field increases for all the excited states and (ii) decreases for all the excited states for all the dot radii. The oscillator strengths coupling ground state with excited states decrease with the magnetic fields.

Keywords: DONOR BINDING; QUANTUM DOT; SEMIMAGNETIC SYSTEM; SPIN POLARON

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jctn.2008.021

Publication date: April 1, 2008

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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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