paper

Quantum Hall Ferromagnetism in Graphene

arXiv:cond-mat/0604113 · doi:10.1103/PhysRevLett.96.256602

Abstract

Graphene is a two-dimensional carbon material with a honeycomb lattice and Dirac-like low-energy excitations. When Zeeman and spin-orbit interactions are neglected its Landau levels are four-fold degenerate, explaining the separation between quantized Hall conductivity values seen in recent experiments. In this paper we derive a criterion for the occurrence of interaction-driven quantum Hall effects near intermediate integer values of due to charge gaps in broken symmetry states.

4 pages, 1 figure

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