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Aharonov-Bohm effect for an exciton in a finite width nano-ring

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Palmero, F., Dorignac, J. , Eilbeck, J. C. and Roemer, Rudolf A.. (2005) Aharonov-Bohm effect for an exciton in a finite width nano-ring. Physical Review B (Condensed Matter and Materials Physics), Vol.72 (No.7). ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.72.075343

Abstract

We study the Aharonov-Bohm effect for an exciton on a nano-ring using a 2D attractive fermionic Hubbard model. We extend previous results obtained for a 1D ring in which only azimuthal motion is considered, to a more general case of 2D annular lattices. In general, we show that the existence of the localization effect, increased by the nonlinearity, makes the phenomenon in the 2D system similar to the 1D case. However, the introduction of radial motion introduces extra frequencies, different from the original isolated frequency corresponding to the excitonic Aharonov- Bohm oscillations. If the circumference of the system becomes large enough, the Aharonov-Bohm effect is suppressed.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Centre for Scientific Computing Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Aharonov-Bohm effect, Exciton theory
Journal or Publication Title:	Physical Review B (Condensed Matter and Materials Physics)
Publisher:	American Physical Society
ISSN:	1098-0121
Date:	17 August 2005
Volume:	Vol.72
Number:	No.7
Identification Number:	10.1103/PhysRevB.72.075343
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	European Union (EU), Secretaría de Estado de Educación y Universidades (Spain)
Grant number:	HPRN-CT- 1999-00163 (LOCNET)
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URI:	http://wrap.warwick.ac.uk/id/eprint/350