Center, Materials and Nanoscience, Nebraska Center for
Nebraska Center for Materials and Nanoscience: Faculty Publications
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Document Type
Article
Date of this Version
3-30-2007
Abstract
Based on first-principles calculations, we demonstrate the impact of the electric polarization on electron transport in ferroelectric tunnel junctions (FTJs). Using a Pt/BaTiO3 /Pt FTJ as a model system, we show that the polarization of the BaTiO3 barrier leads to a substantial drop in the tunneling conductance due to changes in the electronic structure driven by ferroelectric displacements. We find a sizable change in the transmission probability across the Pt/BaTiO3 interface with polarization reversal, a signature of the electroresistance effect. These results reveal exciting prospects that FTJs offer as resistive switches in nanoscale electronic devices.
Comments
Published by American Physical Society. Phys. Rev. Lett. 98, 137201 (2007). http://prl.aps.org. Copyright © 2007 American Physical Society. Permission to use.