Valley polarization effects on the localization in graphene Landau levels

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dc.creatorPereira, Ana L. C.
dc.creatorSchulz, P. A.
dc.date2007-06-19
dc.date2007-11-17
dc.date.accessioned2026-07-07T09:21:50Z
dc.date.available2026-07-07T09:21:50Z
dc.descriptionEffects of disorder and valley polarization in graphene are investigated in the quantum Hall regime. We find anomalous localization properties for the lowest Landau level (LL), where disorder can induce wavefunction delocalization (instead of localization), both for white-noise and gaussian-correlated disorder. We quantitatively identify the contribution of each sublattice to wavefunction amplitudes. Following the valley (sublattice) polarization of states within LLs for increasing disorder we show: (i) valley mixing in the lowest LL is the main effect behind the observed anomalous localization properties, (ii) the polarization suppression with increasing disorder depends on the localization for the white-noise model, while, (iii) the disorder induces a partial polarization in the higher Landau levels for both disorder models.
dc.description5 pages, 6 figures, extended version, with 2 new figures added
dc.identifierhttps://arxiv.org/abs/0706.2856
dc.identifierhttp://arxiv.org/abs/0706.2856
dc.identifierPhys. Rev. B 77, 075416 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.075416
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155167
dc.subjectMesoscale and Nanoscale Physics
dc.subjectDisordered Systems and Neural Networks
dc.titleValley polarization effects on the localization in graphene Landau levels
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