Proximity coupling of granular film with ferroelectric substrate and giant electro-resistance effect

TL;DR

This paper investigates how the ferroelectric substrate influences electron transport in a granular film, revealing a large electro-resistance effect controlled by ferroelectric polarization, with potential applications in memory and sensors.

Contribution

It demonstrates the strong dependence of granular film conductivity on ferroelectric polarization due to screening effects, introducing a novel method to control electron transport via ferroelectric states.

Findings

Conductivity depends on ferroelectric polarization direction.

Large electro-resistance effect observed in the system.

Potential for memory and sensor device applications.

Abstract

We study electron transport in granular film placed above the ferroelectric substrate. We show that the conductivity of granular film strongly depends on the ferroelectric state due to screening effects which 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 electro-resistance effect. This effect can be utilized in memory and electric field sensor applications.