Current and power spectrum in a magnetic tunnel device with an atomic size spacer
Mesoscale and Nanoscale Physics
2009-10-31 v1 Materials Science
Abstract
Current and its noise in a ferromagnetic double tunnel barrier device with a small spacer particle were studied in the framework of the sequential tunneling approach. Analytical formulae were derived for electron tunneling through the spacer particle containing only a single energy level. It was shown that Coulomb interactions of electrons with a different spin orientation lead to an increase of the tunnel magnetoresistance. Interactions can also be responsible for the negative differential resistance. A current noise study showed, which relaxation processes can enhance or reduce fluctuations leading either to a super-Poissonian or a sub-Poissonian shot noise.
Keywords
Cite
@article{arxiv.cond-mat/0003418,
title = {Current and power spectrum in a magnetic tunnel device with an atomic size spacer},
author = {Bogdan R. Bulka},
journal= {arXiv preprint arXiv:cond-mat/0003418},
year = {2009}
}
Comments
12 pages, 4 figures