Spin-Polarized Electrons in Bilayer Graphene Flakes
Mesoscale and Nanoscale Physics
2015-06-12 v1
Abstract
We show that a bilayer graphene flake deposited above a ferromagnetic insulator can behave as a spin-filtering device. The ferromagnetic material induces exchange splitting in the graphene flake, and due to the Fano antiresonances occurring in the transmission of the graphene flake as a function of flake length and energy, it is possible to obtain a net spin current. This happens when an antiresonance for one spin channel coincides with a maximum transmission for the opposite spin. We propose these structures as a means to obtain spin-polarized currents and spin filters in graphene-based systems.
Cite
@article{arxiv.1301.4974,
title = {Spin-Polarized Electrons in Bilayer Graphene Flakes},
author = {P. A. Orellana and L. Rosales and L. Chico and M. Pacheco},
journal= {arXiv preprint arXiv:1301.4974},
year = {2015}
}
Comments
6 pages, 6 figures, submitted to Journal of Applied Physics