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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)

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. (Contact us about this Publication)
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
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
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Nicholas Bristowe
Date Deposited: 21 Feb 2017 14:55 UTC
Last Modified: 29 May 2019 18:38 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/60259 (The current URI for this page, for reference purposes)
Bristowe, Nicholas C.: https://orcid.org/0000-0003-1286-8440
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