Proximity coupling of a granular film with a ferroelectric substrate and giant electroresistance effect

O. G. Udalov, N. M. Chtchelkatchev, and I. S. Beloborodov

Phys. Rev. B 90, 054201 – Published 7 August 2014

Abstract

We study electron transport in granular film placed above the ferroelectric substrate. We show that the conductivity of granular film depends strongly on the ferroelectric state due to screening effects that modify the Coulomb blockade in granular film. In particular, the electric current in granular film is controlled by the direction of ferroelectric polarization. We show that the ferroelectric/granular film system has a large electroresistance effect. This effect can be utilized in memory and electric-field sensor applications.

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Received 15 May 2014
Revised 25 July 2014

DOI:https://doi.org/10.1103/PhysRevB.90.054201

Authors & Affiliations

O. G. Udalov^1,2, N. M. Chtchelkatchev^1,3,4, and I. S. Beloborodov¹

¹Department of Physics and Astronomy, California State University Northridge, Northridge, California 91330, USA
²Institute for Physics of Microstructures, Russian Academy of Science, Nizhny Novgorod, 603950, Russia
³L.D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, 117940 Moscow, Russia
⁴Department of Theoretical Physics, Moscow Institute of Physics and Technology, 141700 Moscow, Russia

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Issue

Vol. 90, Iss. 5 — 1 August 2014

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covering condensed matter and materials physics