کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9586227 1505939 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photo-induced suppression of ferroelectric transition in oxygen-isotope-exchanged SrTiO3
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Photo-induced suppression of ferroelectric transition in oxygen-isotope-exchanged SrTiO3
چکیده انگلیسی
We have investigated photo-induced effects in SrTi(16O1−x18Ox)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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 112, Issues 1–4, April 2005, Pages 259-262
نویسندگان
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