Fermi point in graphene as a monopole in momentum space
M. A. Zubkov
Institute of Theoretical and Experimental Physics, 117259 Moscow, Russia
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.