Indirect Coupling Between Localized Magnetic Moments in Zero-Dimensional Graphene Nanostructures (Quantum Dots)

• Authors: K. Szałowski
• Languages of publication: EN

Abstracts

EN

The indirect Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between on-site magnetic impurities is studied for two kinds of graphene nanoflakes consisting of approximately 100 carbon atoms, posessing either zigzag or armchair edge. The tight-binding Hamiltonian with Hubbard term is used in non-perturbative calculations of coupling between the impurities, placed at the edge of the structure. In general, for zigzag-edged nanoflakes a pronounced coupling robust against charge doping is found, while for armchair-edged structures the interaction is weaker and much more sensitive to charge doping. Also the distance dependence of indirect exchange differs significantly for both edge forms.

Keywords

EN

75.30.Hx; 75.75.-c; 73.22.Pr

Discipline

• 75.75.-c: Magnetic properties of nanostructures
• 73.22.Pr: Electronic structure of graphene
• 75.30.Hx: Magnetic impurity interactions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 236-237

Dates

published

2014-07

Contributors

author

K. Szałowski

• Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Łódź Pomorska 149/153, PL 90-236 Łódź, Poland

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Identifiers

DOI

10.12693/APhysPolA.126.236