Spin-spin correlations of magnetic adatoms on graphene

Spin-spin correlations of magnetic adatoms on graphene

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 interimpurity spin susceptibility is strongly enhanced at low temperatures, s...

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Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2015-03, Vol.91 (12), Article 125403
Hauptverfasser: Güçlü, A. D., Bulut, Nejat
Format: Artikel
Sprache:eng
Schlagworte:
Computer simulation
Condensed matter
Correlation
Decay
Graphene
Magnetic permeability
Mathematical models
Monte Carlo methods
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Zusammenfassung: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 interimpurity spin susceptibility is strongly enhanced at low temperatures, significantly diverging from the well-known Ruderman-Kittel-Kasuya-Yoshida result which decays as R super(-3).
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.91.125403