Splitting electronic spins with a Kondo double dot device
介观与纳米尺度物理
2009-11-10 v2
摘要
We present a simple device made of two small capacitively coupled quantum dots in parallel. This set-up can be used as an efficient "Stern-Gerlach" spin filter, able to simultaneously produce, from a normal metallic lead, two oppositely spin-polarized currents when submitted to a local magnetic field. Our proposal is based on the realization of a Kondo effect where spin and orbital degrees of freedom are entangled, allowing a spatial separation between the two spin polarized currents. In the low temperature Kondo regime, the efficiency is very high and the device conductance reaches the unitary limit, per spin branch.
关键词
引用
@article{arxiv.cond-mat/0404037,
title = {Splitting electronic spins with a Kondo double dot device},
author = {Denis Feinberg and Pascal Simon},
journal= {arXiv preprint arXiv:cond-mat/0404037},
year = {2009}
}
备注
3 pages, 2 figures