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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