| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9586227 | Journal of Luminescence | 2005 | 4 Pages |
Abstract
We have investigated photo-induced effects in SrTi(16O1âx18Ox)3, which undergoes a ferroelectric transition at low temperatures. The ferroelectric transition temperature is lowered by inter-band excitation with ultraviolet light due to the screening of the Coulomb interaction by photo-induced carriers. Considering a microscopic mechanism, we concluded that the critical temperature shift is explained by the hardening of the TO mode with the screening effect. It is suggested that some dipoles with a nanometric size exist in 18O-isotope-exchanged SrTiO3(STO18) and the cooperative interactions among them bring about ferroelectric ordering.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Yasuhiro Yamada, Koichiro Tanaka,