Direct observation of polar tweed in LaAlO3

Reference : Direct observation of polar tweed in LaAlO3


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/40053

Title :	Direct observation of polar tweed in LaAlO3
Language :	English
Author, co-author :	Salje, Ekhard K. H. [> >]
	Alexe, Marin [> >]
	Kustov, Sergey [> >]
	Weber, Mads C. [> >]
	Schiemer, Jason [> >]
	Nataf, Guillaume F. [> >]
	Kreisel, Jens [University of Luxembourg > Rectorate >]
Publication date :	2016
Journal title :	SCIENTIFIC REPORTS
Volume :	6
Peer reviewed :	Yes
Audience :	International
ISSN :	2045-2322 Alexe, Marin/K-3882-2016 Nataf, Guillaume F./J-2175-2019 Alexe, Marin/0000-0002-0386-3026 Nataf, Guillaume F./0000-0001-9215-4717 Weber, Mads C./0000-0002-8837-145X ISI:000376857900001
Abstract :	[en] Polar tweed was discovered in mechanically stressed LaAlO3. Local patches of strained material (diameter ca. 5 mu m) 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 E-g soft-mode frequency by Raman spectroscopy.
Permalink :	http://hdl.handle.net/10993/40053
DOI :	10.1038/srep27193 27193

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Open access	ScientReport_DWs_LNO_2016.pdf		Publisher postprint	1.75 MB	View/Open

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