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Direct observation of polar tweed in LaAlO3

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Salje, Ekhard K. H., Alexe, M. (Marin), Kustov, Sergey, Weber, Mads C., Schiemer, Jason, Nataf, Guillaume F. and Kreisel, Jens (2016) Direct observation of polar tweed in LaAlO3. Scientific Reports, 6 . pp. 1-8. 27193. doi:10.1038/srep27193

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Official URL: http://dx.doi.org/10.1038/srep27193

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Abstract

Polar tweed was discovered in mechanically stressed LaAlO3. Local patches of strained material (diameter ca. 5 μm) form interwoven patterns seen in birefringence images, Piezo-Force Microscopy (PFM) and Resonant Piezoelectric Spectroscopy (RPS). PFM and RPS observations prove unequivocally that electrical polarity exists inside the tweed patterns of LaAlO3. The local piezoelectric effect varies greatly within the tweed patterns and reaches magnitudes similar to quartz. The patterns were mapped by the shift of the Eg soft-mode frequency by Raman spectroscopy.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Piezoelectric devices
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
Official Date: 2 May 2016
Dates:
DateEvent
2 May 2016Available
16 May 2016Accepted
29 February 2016Submitted
Volume: 6
Number of Pages: 8
Page Range: pp. 1-8
Article Number: 27193
DOI: 10.1038/srep27193
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Fonds national de la recherche Luxembourg, Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO), European Regional Development Fund (ERDF)
Grant number: EP/K009702/1 (EPSRC), INTER/MOBILITY/13/6572599, FNR/P12/4853155/Kreisel, MAT 2014-56116-C4-1-R
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