Few-electron eigenstates of concentric double quantum rings
arXiv:cond-mat/0509575 · doi:10.1103/PhysRevB.72.155316
Abstract
Few-electron eigenstates confined in coupled concentric double quantum rings are studied by the exact diagonalization technique. We show that the magnetic field suppresses the tunnel coupling between the rings localizing the single-electron states in the internal ring, and the few-electron states in the external ring. The magnetic fields inducing the ground-state angular momentum transitions are determined by the distribution of the electron charge between the rings. The charge redistribution is translated into modifications of the fractional Aharonov-Bohm period. We demonstrate that the electron distribution can be deduced from the cusp pattern of the chemical potentials governing the single-electron charging properties of the system. The evolution of the electron-electron correlations to the high field limit of a classical Wigner molecule is discussed.
to appear in Physical Review B
References in corpus (12)
- Spectroscopy of nanoscopic semiconductor rings
- Energy spectra of quantum rings
- Quantum rings for beginners: Energy spectra and persistent currents
- Kondo effect in a few-electron quantum ring
- Correlated few-electron states in vertical double-quantum-dot systems
- Two-electron quantum dot molecule: Composite particles and the spin phase diagram
- Observation of Quantum Asymmetry in an Aharonov-Bohm Ring
- Electro-magnetic Aharonov-Bohm effect in a 2-D electron gas ring
- Dissociation of vertical semiconductor diatomic artificial molecules
- Laterally coupled few-electron quantum dots
- Electron spin and charge switching in a coupled quantum dot quantum ring system
- Role of interactions in the far-infrared spectrum of a lateral quantum dot molecule
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- Electron Transfer between Weakly Coupled Concentric Quantum Rings
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- Eccentricity effects on the quantum confinement in double quantum rings
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- Characteristic molecular properties of one-electron double quantum rings under magnetic fields
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- Magnetic-field-induced binding of few-electron systems in shallow quantum dots
- Artificial versus Natural Atoms: The uncanny capability of the many-body Schrödinger equation to produce emergent behavior
- Quantum Walk and Quantum Rings. Effects of a Magnetic Field applied and construction of Quantum Walk by a Moire pattern