Electric and magnetic field effects on the excitonic properties of elliptic core–multishell quantum wires

Macêdo, R. , Costa e Silva, J., Chaves, A., Farias, G.A. and Ferreira, R. (2013) Electric and magnetic field effects on the excitonic properties of elliptic core–multishell quantum wires. Journal of Physics: Condensed Matter, 25(48), 485501. (doi:10.1088/0953-8984/25/48/485501)

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Abstract

The effect of eccentricity distortions of core–multishell quantum wires on their electron, hole and exciton states is theoretically investigated. Within the effective mass approximation, the Schrodinger equation is numerically solved for electrons and holes in systems with single and ¨ double radial heterostructures, and the exciton binding energy is calculated by means of a variational approach. We show that the energy spectrum of a core–multishell heterostructure with eccentricity distortions, as well as its magnetic field dependence, are very sensitive to the direction of an externally applied electric field, an effect that can be used to identify the eccentricity of the system. For a double heterostructure, the eccentricities of the inner and outer shells play an important role on the excitonic binding energy, especially in the presence of external magnetic fields, and lead to drastic modifications in the oscillator strength.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Macedo, Dr Rair
Authors: Macêdo, R., Costa e Silva, J., Chaves, A., Farias, G.A., and Ferreira, R.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Physics: Condensed Matter
Publisher:IOP Publishing
ISSN:0953-8984
ISSN (Online):1361-648X
Published Online:31 October 2013

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