Possibility of magnetic field induced Composite Fermi sea in neutral Graphene

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dc.creatorBaskaran, G.
dc.date2007-02-18
dc.date.accessioned2026-07-07T07:47:26Z
dc.date.available2026-07-07T07:47:26Z
dc.descriptionNeutral graphene in strong magnetic fields is believed to be an (exchange stabilized) integer Hall state of completely filled up spin (say) and empty down spin bands of n = 0, two fold valley degenerate Landau levels. We suggest that correlation energy gain from a nearly SU(4) singlet (2 spin $\times$ 2 valley) composite fermi sea formation, at $ν\approx$ \hlf filling for each component, destabilizes ferromagnetic integer quantum Hall state. This radically different scenario is consistent with a dissipative gapless state seen in experiments in neutral graphene. Interesting paired Hall states are possible, from residual interactions, in this SU(4) fermi sea with a small Zeeman spin polarization.
dc.identifierhttps://arxiv.org/abs/cond-mat/0702420
dc.identifierhttp://arxiv.org/abs/cond-mat/0702420
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124169
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titlePossibility of magnetic field induced Composite Fermi sea in neutral Graphene
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