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VOLUME 95 (2012) | ISSUE 3 | PAGE 168
Fermi point in graphene as a monopole in momentum space
Abstract
We consider the effective field theory of graphene monolayer with the Coulomb interaction between fermions taken into account. The gauge field in momentum space is introduced. The position of the Fermi point coincides with the position of the corresponding monopole. The procedure of extracting such monopoles during lattice simulations is suggested.