| Téléchargement | - Voir le manuscrit accepté : Electronic and magnetic properties of triangular graphene quantum rings (PDF, 442 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevB.83.174441 |
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| Auteur | Rechercher : Potasz, P.1; Rechercher : Guclu, A. D.1; Rechercher : Voznyy, O.1; Rechercher : Folk, J. A.; Rechercher : Hawrylak, P.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 | Electronic and magnetic properties of triangular graphene rings potentially fabricated using carbon nanotubes as masks are described as a function of their size and width. The electronic properties of the charge neutral system are calculated using tight-binding method and interactions are treated using the mean-field Hubbard model. We show that for triangular quantum dots with a triangular hole, the magnetic properties are determined by the width of the ring, leading to ferromagnetic corners and antiferrimagnetic sides. The electronic properties of gated graphene quantum rings as a function of additional number of electrons or holes are described by a combination of tight-binding, Hartree-Fock, and configuration interaction methods. The outer edge is found to be maximally spin polarized for almost all filling factors while the evolution of the excitation gap as a function of shell filling shows oscillations as a result of electronic correlations. |
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| Date de publication | 2011-05-31 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 19371552 |
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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 | daf967cc-4648-4d76-b354-ee1e031fff03 |
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| Enregistrement créé | 2012-02-29 |
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| Enregistrement modifié | 2020-04-21 |
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