We study the effect of Coulomb interaction on the few-electron dynamics in coupled semiconductor quantum dots by exact diagonalization of the few-body Hamiltonian. The oscillation of carriers is strongly affected by the number of confined electrons and by the strength of the interdot correlations. Single-frequency oscillations are found for either uncorrelated or highly correlated states, while multifrequency oscillations take place in the intermediate regime. Moreover, Coulomb interaction renders few-particle oscillations sensitive to perturbations in spatial directions other than that of the tunneling, contrary to the single-particle case. The inclusion of acoustic phonon scattering does not modify the carrier dynamics substantially at short times, but it can damp oscillation modes selectively at long times.

Signatures of molecular correlations in few-electron dynamics of coupled quantum dots / A., Bertoni; J. I., Climente Plasencia; Goldoni, Guido; M., Rontani; U., Hohenester. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 76:(2007), pp. 1-4.

Signatures of molecular correlations in few-electron dynamics of coupled quantum dots

GOLDONI, Guido;
2007

Abstract

We study the effect of Coulomb interaction on the few-electron dynamics in coupled semiconductor quantum dots by exact diagonalization of the few-body Hamiltonian. The oscillation of carriers is strongly affected by the number of confined electrons and by the strength of the interdot correlations. Single-frequency oscillations are found for either uncorrelated or highly correlated states, while multifrequency oscillations take place in the intermediate regime. Moreover, Coulomb interaction renders few-particle oscillations sensitive to perturbations in spatial directions other than that of the tunneling, contrary to the single-particle case. The inclusion of acoustic phonon scattering does not modify the carrier dynamics substantially at short times, but it can damp oscillation modes selectively at long times.
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Signatures of molecular correlations in few-electron dynamics of coupled quantum dots / A., Bertoni; J. I., Climente Plasencia; Goldoni, Guido; M., Rontani; U., Hohenester. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 76:(2007), pp. 1-4.
A., Bertoni; J. I., Climente Plasencia; Goldoni, Guido; M., Rontani; U., Hohenester
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/597416
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