Electronic structure of few-electron concentric double quantum rings
arXiv:cond-mat/0603588 · doi:10.1103/PhysRevB.73.235327
Abstract
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 quasi-degenerate and a rather entangled, strongly-correlated system is formed.
16 pages (preprint format), 6 figures
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Cited by in corpus (9)
- Few-electron artificial molecules formed by laterally coupled quantum rings
- Optical response of two-dimensional few-electron concentric double quantum rings: A local-spin-density-functional theory study
- Aharonov-Bohm Effect in Concentric Quantum Double Rings
- Electron Transfer between Weakly Coupled Concentric Quantum Rings
- Electronic states of laterally coupled quantum rings
- Giant optical anisotropy in cylindrical self-assembled InAs/GaAs quantum rings
- Characteristic molecular properties of one-electron double quantum rings under magnetic fields
- Controlled Operations in a Strongly Correlated Two-Electron Quantum Ring
- Tuning of few-electron states and optical absorption anisotropy in GaAs quantum rings