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Electric-field control of magnetism in graphene quantum dots: Ab initio calculations
Luis A Agapito1, Nicholas Kioussis, Efthimios Kaxiras
1Department of Physics, California State University, Northridge, California 91330-8268, USA.
Abstract:
Employing ab initio calculations we predict that the magnetic states of hydrogenated diamond-shaped zigzag graphene quantum dots (GQDs), each exhibiting unique electronic structure, can be selectively tuned with gate voltage, through Stark or hybridization electric-field modulation of the spatial distribution and energy of the spin-polarized molecular orbitals, leading to transitions between these states. Electrical read-out of the GQD magnetic state can be accomplished by exploiting the distinctive electrical properties of the various magnetic configurations.
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