Interfacial control of oxygen vacancy doping and electrical conduction in thin film oxide heterostructures.

Abstract:

:Oxygen vacancies in proximity to surfaces and heterointerfaces in oxide thin film heterostructures have major effects on properties, resulting, for example, in emergent conduction behaviour, large changes in metal-insulator transition temperatures or enhanced catalytic activity. Here we report the discovery of a means of reversibly controlling the oxygen vacancy concentration and distribution in oxide heterostructures consisting of electronically conducting In2O3 films grown on ionically conducting Y2O3-stabilized ZrO2 substrates. Oxygen ion redistribution across the heterointerface is induced using an applied electric field oriented in the plane of the interface, resulting in controlled oxygen vacancy (and hence electron) doping of the film and possible orders-of-magnitude enhancement of the film's electrical conduction. The reversible modified behaviour is dependent on interface properties and is attained without cation doping or changes in the gas environment.

journal_name

Nat Commun

journal_title

Nature communications

authors

Veal BW,Kim SK,Zapol P,Iddir H,Baldo PM,Eastman JA

doi

10.1038/ncomms11892

subject

Has Abstract

pub_date

2016-06-10 00:00:00

pages

11892

issn

2041-1723

pii

ncomms11892

journal_volume

7

pub_type

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