Magnetic field induced shell-to-core confinement transition in type-II semiconductor quantum wires

Macêdo, R. , Costa e Silva, J., Chaves, A., Farias, G.A. and Ferreira, R. (2013) Magnetic field induced shell-to-core confinement transition in type-II semiconductor quantum wires. Journal of Applied Physics, 113(15), 153710. (doi:10.1063/1.4802588)

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Abstract

We investigate the excitonic properties of a core-multishell semiconductor nanowire with type-II band mismatch, i.e., with spatially separated electrons and holes, under an external magnetic field. Our results demonstrate that, depending on the core wire radius, the carrier in the type-II band exhibits either a quantum dot-like or a quantum ring-like energy spectrum, corresponding to a carrier confinement in the core wire or in the outer shell, respectively. In the latter, a shell-to-core confinement transition can be induced by increasing the magnetic field intensity, which may lead to interesting photocurrent properties of these confining structures, tunable by the external field.

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 Applied Physics
Publisher:AIP Publishing
ISSN:0021-8979
ISSN (Online):1089-7550
Published Online:19 April 2013

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