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Title
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Driven spin transitions in fluorinated single- and bilayer-graphene quantum dots
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Author
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Abstract
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| Spin transitions driven by a periodically varying electric potential in dilute fluorinated graphene quantum dots are investigated. Flakes of monolayer graphene as well as electrostatic electron traps induced in bilayer graphene are considered. The stationary states obtained within the tight-binding approach are used as the basis for description of the system dynamics. The dilute fluorination of the top layer lifts the valley degeneracy of the confined states and attenuates the orbital magnetic dipole moments due to current circulation within the flake. The spin-orbit coupling introduced by the surface deformation of the top layer induced by the adatoms allows the spin flips to be driven by the AC electric field. For the bilayer quantum dots the spin flip times is substantially shorter than the spin relaxation. Dynamical effects including many-photon and multilevel transitions are also discussed. |
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Language
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English
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Source (journal)
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Semiconductor science and technology. - London
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Publication
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London
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2017
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ISSN
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0268-1242
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DOI
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10.1088/1361-6641/AA6DF4
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Volume/pages
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32
:6
(2017)
, 11 p.
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Article Reference
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065016
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ISI
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000402405800007
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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