Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 26: Transport: Graphene (TT jointly with O)

O 26.12: Talk

Tuesday, April 1, 2014, 12:45–13:00, WIL C107

Wigner Crystal phases in bilayer graphene — •Peter Silvestrov and Patrik Recher — Institut für Mathematische Physik, TU Braunschweig, Germany

It is generally believed that Wigner Crystal in single layer graphene can not exist because the magnitudes of the electron interaction and the kinetic energy scale similarly with the decreasing electron density. This scaling argument however does not work for the low energy states in bilayer graphene. We consider the Wigner Crystal in slightly doped bilayer graphene with a gap in spectrum opened by applying a perpendicular electric field. We argue that in this system the formation of the Wigner Crystal is not only possible, but a different phases of the crystal with very peculiar properties may exist here depending on the parameters.