Sequential Tunneling through Molecular Spin Rings
Mesoscale and Nanoscale Physics
2007-05-23 v2
Abstract
We consider electrical transport through molecules with Heisenberg-coupled spins arranged in a ring structure in the presence of an easy-axis anisotropy. The molecules are coupled to two metallic leads and a gate. In the charged state of the ring, a Zener double-exchange mechanism links transport properties to the underlying spin structure. This leads to a remarkable contact-site dependence of the current, which for an antiferromagnetic coupling of the spins can lead to a total suppression of the zero-bias conductance when the molecule is contacted at adjacent sites.
Cite
@article{arxiv.cond-mat/0608642,
title = {Sequential Tunneling through Molecular Spin Rings},
author = {Jörg Lehmann and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0608642},
year = {2007}
}
Comments
4 pages, 3 figures