Spin-charge states of correlated electrons in a one-dimensional quantum dot attached to interacting leads are studied in the non-linear transport regime. With non-symmetric tunnel barriers, regions of negative differential conductance induced by spin-charge separation are found. They are due to a correlation-induced trapping of higher-spin states without magnetic field, and associated with a strong increase in the fluctuations of the electron spin.
@article{arxiv.cond-mat/0309619,
title = {Negative differential conductance induced by spin-charge separation},
author = {F. Cavaliere and A. Braggio and J. T. Stockburger and M. Sassetti and B. Kramer},
journal= {arXiv preprint arXiv:cond-mat/0309619},
year = {2011}
}
Comments
REVTEX, 4 pages including 3 figures; Accepted for publication on Physical Review Letters