Local moment formation in quantum point contacts
Mesoscale and Nanoscale Physics
2009-11-07 v1
Abstract
Spin-density-functional theory of quantum point contacts (QPCs) reveals the formation of a local moment with a net of one electron spin in the vicinity of the point contact - supporting the recent report of a Kondo effect in a QPC. The hybridization of the local moment to the leads decreases as the QPC becomes longer, while the onsite Coulomb-interaction energy remains almost constant.
Cite
@article{arxiv.cond-mat/0211641,
title = {Local moment formation in quantum point contacts},
author = {Kenji Hirose and Yigal Meir and Ned S. Wingreen},
journal= {arXiv preprint arXiv:cond-mat/0211641},
year = {2009}
}
Comments
10 pages, 3 figures, accepted for publication in Physical Review Letters