Local Electrical Imaging of Tetragonal Domains and Field-Induced Ferroelectric Twin Walls in Conducting SrTiO3
Citation:
Ma H.J.H, Scharinger S, Zeng S.W, Kohlberger D, Lange M, Stöhr A, Wang X.R, Venkatesan T, Kleiner R, Scott J.F, Coey J.M.D, Koelle D, Ariand, Local Electrical Imaging of Tetragonal Domains and Field-Induced Ferroelectric Twin Walls in Conducting SrTiO3, Physical Review Letters, 116, 25, 2016, 257601-Download Item:
Abstract:
We demonstrate electrical mapping of tetragonal domains and electric field-induced twin walls in
SrTiO
3
as a function of temperature and gate bias utilizing the conducting LaAlO
3
=
SrTiO
3
interface and
low-temperature scanning electron microscopy. Conducting twin walls appear below 105 K, and new twin
patterns are observed after thermal cycling through the transition or on electric field gating. The nature of
the twin walls is confirmed by calculating their intersection angles for different substrate orientations.
Numerous walls formed when a large side- or back-gate voltage is applied are identified as field-induced
ferroelectric twin walls in the paraelectric tetragonal matrix. The walls persist after switching off the electric
field and on thermal cycling below 105 K. These observations point to a new type of ferroelectric
functionality in SrTiO
3
, which could be exploited together with magnetism and superconductivity in a
multifunctional context
Author's Homepage:
http://people.tcd.ie/jcoey
Author: COEY, JOHN
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Journal ArticleCollections
Series/Report no:
Physical Review Letters116
25
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Full text availableKeywords:
electrical mapping of tetragonal domainsDOI:
http://dx.doi.org/10.1103/PhysRevLett.116.257601Metadata
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