Giant Electroresistance in Ferroelectric Tunnel Junctions
Preprint
- 3 February 2005
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.Keywords
All Related Versions
- Version 1, 2005-02-03, ArXiv
- Published version: Physical Review Letters, 94 (24), 246802.
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