Sextic anharmonicity and ferroelectricity in photoexcited SrTiO3 at low temperatures

Details Sextic anharmonicity and ferroelectricity in photoexcited SrTiO3 at low temperatures Sextic anharmonicity and ferroelectricity in photoexcited SrTiO3 at low temperatures

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007njph....9..320q&link_type=abstract

New Journal of Physics, Volume 9, Issue 9, pp. 320 (2007).

Physics

1

Scientific paper

Ultraviolet light induces ferroelectric domains in SrTiO3 at low temperatures. The ferroelectric domains are related to anharmonic soft modes of the crystal. We show the sextic anharmonicity is the lowest order for the soft mode to give rise to ferroelectricity in SrTiO3 after photoexcitation. The occurrence of a quartic anharmonicity and/or harmonicity for the soft mode potential will suppress the domain structure in the crystal.

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