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Phys. Rev. Lett. 95, 196804 (2005) [4 pages]

Ferroelectricity of Perovskites under Pressure

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Igor A. Kornev1,*, L. Bellaiche1, P. Bouvier2, P.-E. Janolin3, B. Dkhil3, and J. Kreisel4
1Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA
2Laboratoire d’Electrochimie et de Physicochimie des Matériaux et des Interfaces, CNRS, BP 75, 38402 St. Martin d’Hères Cedex, France
3Laboratoire Structures, Propriétés et Modélisation des Solides, CNRS-UMR8580, Ecole Centrale Paris, 92290 Châtenay-Malabry, France
4Laboratoire des Matériaux et du Génie Physique, ENS de Physique de Grenoble, B.P.46, 38402 St. Martin d’Hères, France

Received 9 August 2005; published 31 October 2005

Ab initio simulations and experimental techniques are combined to reveal that, unlike what was commonly accepted for more than 30 years, perovskites and related materials enhance their ferroelectricity as hydrostatic pressure increases above a critical value. This unexpected high-pressure ferroelectricity is different in nature from conventional ferroelectricity because it is driven by an original electronic effect rather by long-range interactions.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.196804
DOI:
10.1103/PhysRevLett.95.196804
PACS:
77.80.Bh, 62.50.+p, 77.84.Dy

*Also at Novgorod State University, Russia.

Electronic address: ikornev@uark.edu

 
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