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Electronic Shells of Dirac Fermions in Graphene Quantum Rings in a Magnetic Field

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Potasz P., Güçlü A., Hawrylak P.
Acta Physica Polonica A
|
2009
|
vol. 116
|
issue 5
832-834
EN
We present results of tight binding calculations demonstrating existence of degenerate electronic shells of Dirac fermions in narrow, charge neutral graphene quantum rings. We predict removal of degeneracy with finite magnetic field. We show, using a combination of tight binding and configuration interaction methods, that by filling a graphene ring with additional electrons this carbon based structure with half-filled shell acquires a finite magnetic moment.
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