Current browse context:
cond-mat.mes-hall
Change to browse by:
References & Citations
Condensed Matter > Mesoscale and Nanoscale Physics
Title: Current vortices in hexagonal graphene quantum dots
(Submitted on 16 Mar 2021 (v1), last revised 8 Oct 2021 (this version, v3))
Abstract: Newly synthesized nanostructures of graphene appear as a promising breeding ground for new technology. Therefore, it is important to identify the role played by the boundary conditions in their electronic features. In this contribution we use the non-equilibrium Green's function method coupled to tight-binding theory to calculate and compare the current patterns of hexagonal graphene quantum dots, with contacts placed at different edge locations. Our results reveal the formation of current vortices when the symmetry of the contact geometry is in conflict with the symmetries of the quantum dot. The presence of current vortices suggests the use of graphene quantum dots as nanomagnets or magnetic nanosensors.
Submission history
From: Eudes Gomes [view email][v1] Tue, 16 Mar 2021 21:38:01 GMT (21711kb,D)
[v2] Thu, 18 Mar 2021 10:11:33 GMT (21711kb,D)
[v3] Fri, 8 Oct 2021 11:32:19 GMT (4438kb,D)
Link back to: arXiv, form interface, contact.