Giant Electroresistance in Ferroelectric Tunnel Junctions
Other Condensed Matter
2009-11-11 v1
Abstract
The interplay between the electron transport in metal/ferroelectric/metal junctions with ultrathin ferroelectric barriers and the polarization state of a barrier is investigated. Using a model which takes into account screening of polarization charges in metallic electrodes and direct quantum tunneling across a ferroelectric barrier we calculate the change in the tunneling conductance associated with the polarization switching. We find the conductance change of a few orders of magnitude for metallic electrodes with significantly different screening lengths. This giant electroresistance effect is the consequence of a different potential profile seen by transport electrons for the two opposite polarization orientations.
Cite
@article{arxiv.cond-mat/0502109,
title = {Giant Electroresistance in Ferroelectric Tunnel Junctions},
author = {M. Ye. Zhuravlev and R. F. Sabirianov and S. S. Jaswal and E. Y. Tsymbal},
journal= {arXiv preprint arXiv:cond-mat/0502109},
year = {2009}
}
Comments
4 pages