Archivio Istituzionale della RicercaWe 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.
Multiple quantum phases in artificial double-dot molecules / Rontani, M.; Rossi, Fausto; Manghi, F.; Molinari, E.. - In: SOLID STATE COMMUNICATIONS. - ISSN 0038-1098. - 112:3(1999), pp. 151-155. [10.1016/S0038-1098(99)00305-1]
Multiple quantum phases in artificial double-dot molecules
ROSSI, FAUSTO;
1999
Abstract
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.
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https://hdl.handle.net/11583/1405212
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