A spin-filter device based on armchair graphene nanoribbons
Mesoscale and Nanoscale Physics
2015-05-27 v1
Abstract
The coherent spin-polarized electron transport through a zigzag-edge graphene flake (ZGF), sandwiched between two semi-infinite armchair graphene nanoribbons, is investigated by means of Landauer-Buttiker formalism. To study the edge magnetism of the ZGF, we use the half-filled Hubbard model within the Hartree-Fock approximation. The results show that the junction acts as a spin filter with high degree of spin polarization in the absence of magnetic electrodes and external fields. By applying a gate voltage the spin-filtering efficiency of this device can be effectively controlled and the spin polarization can reach values as high as 90%.
Cite
@article{arxiv.1101.2948,
title = {A spin-filter device based on armchair graphene nanoribbons},
author = {A. Saffarzadeh and R. Farghadan},
journal= {arXiv preprint arXiv:1101.2948},
year = {2015}
}
Comments
4 pages, 3 figures