A Gigantic Photoinduced Dielectric Constant of Quantum Paraelectric Perovskite Oxides Observed under a Weak DC Electric Field

15 January 2003

journal article
letter
Published by Physical Society of Japan in Journal of the Physics Society Japan

Vol. 72 (1) , 37-40
https://doi.org/10.1143/jpsj.72.37

Abstract

A gigantic enhancement of dielectric constant by UV light irradiation is reported for the first time in the quantum paraelectric family of perovskite oxides, such as SrTiO ₃ and KTaO ₃, under a weak DC field. The enhancement has not been observed in ferroelectric SrTi ¹⁸O ₃ induced by substitution of ¹⁸O for ¹⁶O. The present result suggests a new class of light-switching phenomena controllable externally.

Keywords

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