Probing Surface and Bulk Electrochemical Processes on the LaAlO3-SrTiO3 Interface

Kumar, Amit, Arruda, Thomas M., Kim, Yunseok, Ivanov, Ilia N., Jesse, Stephen, Bark, Chung W., Bristowe, Nicholas C., Artacho, Emilio, Littlewood, Peter B., Eom, Chang-Beom, and others. (2012) Probing Surface and Bulk Electrochemical Processes on the LaAlO3-SrTiO3 Interface. ACS NANO, 6 (5). pp. 3841-3852. ISSN 1936-0851. (doi:10.1021/nn204960c) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:60259)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL: http://dx.doi.org/10.1021/nn204960c

Abstract

Local electrochemical phenomena on the surfaces of the LaAlO3-SrTiO3 heterostructure are explored using unipolar and bipolar dynamic electrochemical strain microscopy (D-ESM). The D-ESM suggests the presence of at least two distinct electrochemical processes, Including fast reversible low-voltage process and slow high-voltage process. The latter process Is associated with static surface deformations In the sub-nanometer regime. These behaviors are compared with Kelvin probe force microscopy hysteresis data. The possible origins of observed phenomena are discussed, and these studies suggest that charge-writing behavior in LAO-STO includes a strong surface/bulk electrochemical component and is more complicated than simple screening by surface adsorbates.

Item Type:	Article
DOI/Identification number:	10.1021/nn204960c
Uncontrolled keywords:	electrochemical; dynamic strain; microscopy; charge writing
Subjects:	Q Science > QC Physics > QC173.45 Condensed Matter REF2014 Units of Assessment > Main panel C > C19 Business and Management Studies > QC173.45 Condensed Matter Q Science > QC Physics > QC176 Solid state physics Q Science > QD Chemistry > QD478 Solid State Chemistry Q Science > QD Chemistry > QD473 Physical properties in relation to structure
Institutional Unit:	Schools > School of Engineering, Mathematics and Physics > Physics and Astronomy
Former Institutional Unit:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Nicholas Bristowe
Date Deposited:	21 Feb 2017 14:55 UTC
Last Modified:	20 May 2025 09:42 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/60259 (The current URI for this page, for reference purposes)

University of Kent Author Information

Bristowe, Nicholas C..

Creator's ORCID:	https://orcid.org/0000-0003-1286-8440
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