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Multiple quantum phases in artificial double-dot molecules
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Paper
Multiple quantum phases in artificial double-dot molecules
1999
Overview
We study coupled semiconductor quantum dots theoretically through 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 a function of the inter-dot distance d; at intermediate values of d we predict a new phase that should be observable in the addition spectra and in the magnetization changes.
Publisher
Cornell University Library, arXiv.org
Subject
