Spin-spin correlations of magnetic impurities in graphene
arXiv:1410.8354 · doi:10.1103/PhysRevB.91.125403
Abstract
We study the interaction between two magnetic adatom impurities in graphene using the Anderson model. The two-impurity Anderson Hamiltonian is solved numerically by using the quantum Monte Carlo technique. We find that the inter-impurity spin susceptibility is strongly enhanced at low temperatures, significantly diverging from the well-known Ruderman-Kittel-Kasuya-Yoshida (RKKY) result which decays as .
4 pages, 4 figures
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