Abstract
We argue that the low energy electron excitations of the curved graphene
sheet \$\Sigma\$ are solutions of the massless Dirac equation on a 2+1
dimensional ultra-static metric on \$\Bbb R \Sigma\$. An externally
applied magnetic field on the graphene sheet induces a gauge potential on the
world volume of the membrane which could be mimicked by considering a
stationary optical metric of the Zermelo form, which is conformal to the BTZ
black hole when the sheet has a constant negative curvature. We show that there
is fundamental geometric obstacle to obtain a model that extends all the way to
the black hole horizon.
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