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Incompressible States of Dirac Fermions in Graphene with Anisotropic Interactions

We report on the properties of incompressible states of Dirac fermions in graphene in the presence of anisotropic interactions and a quantizing magnetic field. We introduce the necessary formalism to incorporate the anisotropy in the system. The incopmpressible state in graphene is found to survive the anisotropy upto a critical value of the anisotropy parameter. The anisotropy also introduces two branches in the collective excitations of the corresponding Laughlin state. It strongly influences the short-range behavior of the pair-correlation functions in the incompressible ground state.

preprint2013arXivOpen access
V. M. ApalkovTapash Chakraborty
cond-mat.mes-hall
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V. M. ApalkovTapash Chakraborty

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