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Electronic structure of few-electron concentric double quantum rings
Climente, J. I.; Planelles, Josep (Planelles Fuster); Barranco Gómez, Manuel; Malet i Giralt, Francesc; Pi Pericay, Martí
Universitat de Barcelona
The ground state structure of few-electron concentric double quantum rings is investigated within the local spin density approximation. Signatures of inter-ring coupling in the addition energy spectrum are identified and discussed. We show that the electronic configurations in these structures can be greatly modulated by the inter-ring distance: At short and long distances the low-lying electron states localize in the inner and outer rings, respectively, and the energy structure is essentially that of an isolated single quantum ring. However, at intermediate distances the electron states localized in the inner and the outer ring become quasidegenerate and a rather entangled, strongly-correlated system is formed.
04-05-2010
Semiconductors
Electrònica quàntica
Semiconductors
Quantum electronics
(c) The American Physical Society, 2006
Article
The American Physical Society
         

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