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Nature Materials 4, 13 - 14 (2005)
doi:10.1038/nmat1287
Ferroelectrics: Novel geometric ordering of ferroelectricity
J. F. Scott1
- J. F. Scott is at the Centre for Ferroics, Earth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UK. e-mail: jsco99@esc.cam.ac.uk
Abstract
A detailed ab initio model of ferroelectric ordering in thin films shows that phase transitions and ferroelectric bistability occur down to diameters of 3.2 nm in nanodisks and nanorods. Unexpected circular or toroidal ordering of dipoles describes the low-temperature ground state, rather than conventional parallel or antiparallel atomic displacements.
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