Giant electroresistance and tunable magnetoelectricity in a multiferroic junction

Abstract

First-principles density functional calculations show that the ${\text{SrRuO}}_3/{\text{PbTiO}}_3/{\text{SrRuO}}_3$ multiferroic junction with asymmetric (RuO${}_2$/PbO and TiO${}_2$/SrO) interfaces has a large ferroelectric depolarizing field, whose switching changes the interface transmission probabilities for tunneling electrons, leading to electroresistance modulation over several orders of magnitude. The switching further affects the interface spin density, naturally driving magnetoresistance as well as modulated spin-dependent in-plane resistivity, which may be exploited in field-effect devices.

7 pages, 10 figures, 1 table; extended upon review

References in corpus (4)

• BoltzTraP. A code for calculating band-structure dependent quantities
• Surface Magnetoelectric Effect in Ferromagnetic Metal Films
• Ferroelectric PbTiO${}_3$/SrRuO${}_3$ superlattices with broken inversion symmetry
• Coexistance of giant tunneling electroresistance and magnetoresistance in an all-oxide magnetic tunnel junction

Cited by in corpus (3)

• Prediction of a native ferroelectric metal
• Design of $n$- and $p$-type oxide thermoelectrics in LaNiO${}_3$/SrTiO${}_3(001)$ superlattices exploiting interface polarity
• A three-order-parameter bistable magnetoelectric multiferroic metal