Interaction-induced negative differential resistance in asymmetric molecular junctions
Mesoscale and Nanoscale Physics
2013-01-10 v1
Abstract
Combining insights from quantum chemistry calculations with master equations, we discuss a mechanism for negative differential resistance (NDR) in molecular junctions, operated in the regime of weak tunnel coupling. The NDR originates from an interplay of orbital spatial asymmetry and strong electron-electron interaction, which causes the molecule to become trapped in a non-conducting state above a voltage threshold. We show how the desired asymmetry can be selectively introduced in individual orbitals in e.g., OPE-type molecules by functionalization with a suitable side group, which is in linear conjugation to one end of the molecule and cross-conjugated to the other end.
Cite
@article{arxiv.1012.3856,
title = {Interaction-induced negative differential resistance in asymmetric molecular junctions},
author = {Martin Leijnse and Wei Sun and Mogens Brøndsted Nielsen and Per Hedegård and Karsten Flensberg},
journal= {arXiv preprint arXiv:1012.3856},
year = {2013}
}
Comments
8 pages