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Theory of Addition Spectra in Double Quantum Dots: Single-Particle Tunneling vs Coulomb Interactions
Published online by Cambridge University Press: 10 February 2011
Abstract
We study coupled semiconductor quantum dots theoretically using a generalized Hubbard approach, where intra- and inter-dot Coulomb correlation, as well as tunneling effects are described on the basis of realistic electron wavefunctions. We find that the ground-state configuration of vertically coupled double dots undergoes non-trivial quantum transitions as the inter-dot distance d changes; at intermediate values of d we predict a new phase that should be observable in the addition spectra and in the magnetization changes.
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- Copyright © Materials Research Society 2000
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