Highly mobile vortex structures inside polar twin boundaries in SrTiO3

Zykova-Timan, Tatyana and Salje, Ekhard K. H. (2014) Highly mobile vortex structures inside polar twin boundaries in SrTiO3. Applied Physics Letters, 104 (8). 082907. ISSN 0003-6951, ESSN: 1077-3118 DOI 10.1063/1.4866859

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Abstract

We present computer simulations of previously unknown polarization singularities (vortexes) inside polar SrTiO3 twin boundaries. Usually polarity in twin walls is ferri-electric, whereas vortex excitations lead to true ferroelectricity on a very local scale. As a result, in-plane electric fields can selectively stabilize one of the vortex polarization states and enhance the ability of the walls to move. This behavior can explain the well-known and uniquely high, mobility of twin boundaries in SrTiO3. For nanoscale ferroelectric memory devices, we envisage a precisely controllable device, where a desired domain wall pattern is manipulated by shifting the vortex position electrically.

Item Type: Article
Additional Information: © 2014 Author(s).. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
Uncontrolled Keywords: 2014ARE; IA67;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
07 - Gold Open Access
Journal or Publication Title: Applied Physics Letters
Volume: 104
Page Range: 082907
Identification Number: 10.1063/1.4866859
Depositing User: Sarah Humbert
Date Deposited: 05 May 2014 15:21
Last Modified: 16 May 2014 12:25
URI: http://eprints.esc.cam.ac.uk/id/eprint/3045

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