Fano and Dicke effects and spin polarization in a double Rashba-ring system side coupled to a quantum wire
Mesoscale and Nanoscale Physics
2008-03-31 v1
Abstract
The electronic transport in a system of two quantum rings side-coupled to a quantum wire is studied via a single-band tunneling tight-binding Hamiltonian. We derived analytical expressions for the conductance and spin polarization when the rings are threaded by magnetic fluxes with Rashba spin-orbit interaction. We show that by using the Fano and Dicke effects this system can be used as an efficient spin-filter even for small spin orbit interaction and small values of magnetic flux. We compare the spin-dependent polarization of this design and the polarization obtained with one ring side coupled to a quantum ring. As a main result, we find better spin polarization capabilities as compared to the one ring design
Cite
@article{arxiv.0803.4014,
title = {Fano and Dicke effects and spin polarization in a double Rashba-ring system side coupled to a quantum wire},
author = {V. M. Apel and P. A. Orellana and M. Pacheco},
journal= {arXiv preprint arXiv:0803.4014},
year = {2008}
}
Comments
6 pages, 7 figures