Electric-field controlled spin in bilayer triangular graphene quantum dots
- 25 July 2011
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 84 (3)
- https://doi.org/10.1103/physrevb.84.035425
Abstract
We present theoretical results based on mean-field and exact many-body approaches showing that in bilayer triangular graphene quantum dots with zigzag edges, the magnetism can be controlled by an external vertical electric field. We demonstrate that without electric field, the spins of the two layers of the quantum dot interact ferromagnetically. At a critical value of the electric field, the total spin of the bilayer structure can be turned off or reduced to a single-localized spin, a qubit isolated from contacts and free from interaction with nuclear spins. DOI: http://dx.doi.org/10.1103/PhysRevB.84.035425 Published by the American Physical SocietyKeywords
This publication has 41 references indexed in Scilit:
- Transforming C60 molecules into graphene quantum dotsNature Nanotechnology, 2011
- The electronic properties of grapheneReviews of Modern Physics, 2009
- Chaotic Dirac Billiard in Graphene Quantum DotsScience, 2008
- First direct observation of Dirac fermions in graphiteNature Physics, 2006
- Two-dimensional gas of massless Dirac fermions in grapheneNature, 2005
- Experimental observation of the quantum Hall effect and Berry's phase in grapheneNature, 2005
- Electric Field Effect in Atomically Thin Carbon FilmsScience, 2004
- Surface plasmons in graphite intercalation compoundsSolid State Communications, 1987
- Effect ofc-axis dispersion on the optical properties of acceptor-type graphite intercalation compoundsPhysical Review B, 1985
- The Band Theory of GraphitePhysical Review B, 1947