Affiliation:
1. Department of Physics University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
2. Department of Materials and Earth Sciences Technical University of Darmstadt 64287 Darmstadt Germany
Abstract
AbstractSrTiO3, a perovskite oxide, holds significant potential for application in the field of oxide electronics. Notably, its photoelectric activity in the low temperature regime, which overlaps with the quantum paraelectric state, exhibits remarkable characteristics. In this study, it is demonstrated that when photo‐excited with above band gap energy photons, SrTiO3 exhibits non‐linear transport of photocarriers and voltage‐controlled negative resistance, resulting from an intervalley transfer of photo‐induced electrons. As a consequence of the negative resistance, the photocurrent becomes unstable and spontaneously gives rise to low frequency Gunn‐like oscillations.
Funder
Deutsche Forschungsgemeinschaft
Engineering and Physical Sciences Research Council
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)