Electron-electron interaction and charging effects in graphene quantum dots

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dc.creatorWunsch, B.
dc.creatorStauber, T.
dc.creatorGuinea, F.
dc.date2007-07-19
dc.date2007-12-11
dc.date.accessioned2026-07-07T09:18:42Z
dc.date.available2026-07-07T09:18:42Z
dc.descriptionWe analyze charging effects in graphene quantum dots. Using a simple model, we show that, when the Fermi level is far from the neutrality point, charging effects lead to a shift in the electrostatic potential and the dot shows standard Coulomb blockade features. Near the neutrality point, surface states are partially occupied and the Coulomb interaction leads to a strongly correlated ground state which can be approximated by either a Wigner crystal or a Laughlin like wave function. The existence of strong correlations modify the transport properties which show non equilibrium effects, similar to those predicted for tunneling into other strongly correlated systems.
dc.descriptionExtended version accepted for publication at Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0707.2948
dc.identifierhttp://arxiv.org/abs/0707.2948
dc.identifierPhys. Rev. B 77, 035316 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.035316
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154120
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleElectron-electron interaction and charging effects in graphene quantum dots
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