1210.5744 (E. Kogan)

All approaches to RKKY interaction in graphene are equal, but some
approaches are more equal than others    [PDF]

E. Kogan

We show explicitly that two approaches to calculations of RKKY interaction in graphene, one based on Green's functions in coordinate--time representation, and the other based on Green's functions in momentum--frequency representation, give exactly the same results and none of them has to operate with diverging integrals and implement the cut-off procedure. Together with this we claim that the first approach is more convenient for the calculations than the second one.

View original: http://arxiv.org/abs/1210.5744