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Electronic states and optical transitions in a graphene quantum dot in a normal magnetic field

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Author(s): Grujić Marko | Tadić Milan

Journal: Serbian Journal of Electrical Engineering
ISSN 1451-4869

Volume: 8;
Issue: 1;
Start page: 53;
Date: 2011;
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Keywords: graphene | circular | quantum dot

ABSTRACT
An analytical approach using the Dirac-Weyl equation is implemented to obtain the energy spectrum and optical absorption of a circular graphene quantum dot in the presence of an external magnetic field. The results are obtained for the infinite-mass and zigzag boundary conditions. We found that the energy spectra of a dot with zigzag boundary condition exhibit a zero energy band regardless of the value of the magnetic field, while for the infinite mass boundary conditions, the zero energy states appear only for high magnetic fields.
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