Electronic shells of Dirac fermions in graphene quantum rings in a magnetic field

Details Electronic shells of Dirac fermions in graphene quantum rings in a magnetic field Electronic shells of Dirac fermions in graphene quantum rings in a magnetic field

2009-08-25

arxiv.org/abs/0908.3693v1

ACTA PHYSICA POLONICA A 116, 832-834 (2009)

Physics

Condensed Matter

Materials Science

10 pages, 4 figures

Scientific paper

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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