Current vortices in hexagonal graphene quantum dots

نویسندگان

چکیده

Newly synthesized nanostructures of graphene appear as a promising breeding ground for new technology. Therefore, it is important to identify the role played by boundary conditions in their electronic features. In this contribution we use non-equilibrium Green's function method coupled tight-binding theory calculate and compare current patterns hexagonal quantum dots, with contacts placed at different edge locations. Our results reveal formation vortices when symmetry contact geometry conflict symmetries dot. The presence suggests dots nanomagnets or magnetic nanosensors.

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ژورنال

عنوان ژورنال: Physical Review B

سال: 2021

ISSN: ['1098-0121', '1550-235X', '1538-4489']

DOI: https://doi.org/10.1103/physrevb.104.165408