The zero-energy state in graphene in a high magnetic field

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dc.creatorCheckelsky, Joseph G.
dc.creatorLi, Lu
dc.creatorOng, N. P.
dc.date2007-08-14
dc.date2007-12-05
dc.date.accessioned2026-07-07T09:39:46Z
dc.date.available2026-07-07T09:39:46Z
dc.descriptionThe fate of the charge-neutral Dirac point in graphene in a high magnetic field $H$ has been investigated at low temperatures ($T\sim$ 0.3 K). In samples with small $V_0$ (the gate voltage needed to access the Dirac point), the resistance $R_0$ at the Dirac point diverges steeply with $H$, signalling a crossover to an insulating state in intense field. The approach to the insulating state is highly unusual. Despite the steep divergence in $R_0$, the profile of $R_0$ vs. $T$ in fixed $H$ saturates to a $T$-independent value below 2 K, consistent with charge carrying gapless excitations.
dc.description4 pages, 4 figures. Four new sub-figures have been added. Text expanded to discuss data from more samples
dc.identifierhttps://arxiv.org/abs/0708.1959
dc.identifierhttp://arxiv.org/abs/0708.1959
dc.identifierPhys. Rev. Lett. 100, 206801 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.206801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161296
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleThe zero-energy state in graphene in a high magnetic field
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