2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/161296The 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.4 pages, 4 figures. Four new sub-figures have been added. Text expanded to discuss data from more samplesMesoscale and Nanoscale PhysicsMaterials Sciencetext