▎ 摘　　要

The study of the interaction potential between static charges within Monte Carlo simulation of graphene is carried out. The numerical simulations are performed in the effective lattice field theory with noncompact (3 + 1)-dimensional Abelian lattice gauge fields and (2 + 1)-dimensional staggered lattice fermions. It is shown that for all considered temperatures the interaction can be well described by the Debye screened potential created by two-dimensional electron-hole excitations. At low temperatures Debye mass m(D) plays a role of order parameter of the insulator-semimetal phase transition. In the semimetal phase at high temperature graphene effective field theory reveals the properties of weakly interacting two-dimensional plasma of fermion excitations.