DOI | Trouver le DOI : https://doi.org/10.1209/epl/i2004-10189-2 |
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Auteur | Rechercher : Evaldson, M.; Rechercher : Zozoulenko, I. V.; Rechercher : Ciorga, M.1; Rechercher : Zawadzki, Piotr1; Rechercher : Sachrajda, A. S.1 |
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Affiliation | - Conseil national de recherches du Canada. Institut des sciences des microstructures du CNRC
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Format | Texte, Article |
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Résumé | We demonstrate that the magnetoconductance of small lateral quantum dots in the strongly coupled regime (i.e. when the leads can support one or more propagating modes) shows a pronounced splitting of the conductance peaks and dips which persists over a wide range of magnetic fields (from zero field to the edge-state regime) and is virtually independent of the magnetic field strength. Our numerical analysis of the conductance based on the Hubbard Hamiltonian demonstrates that this is essentially a many-body/spin effect that can be traced to a splitting of degenerate levels in the corresponding closed dot. The above effect in open dots can be regarded as a counterpart of the Coulomb-blockade effect in weakly coupled dots, with the difference, however, that the splitting of the peaks originates from interactions between electrons of opposite spin. |
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Date de publication | 2004 |
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Dans | |
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Numéro NPARC | 12743965 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | d57c1b20-901e-47c9-96e1-475ce5b0f564 |
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Enregistrement créé | 2009-10-27 |
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Enregistrement modifié | 2020-04-17 |
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