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Updated: Aug 15, 2026
Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
Photoinduced Negative Differential Resistivity and Gunn Oscillations in SrTiO3
Mehrzad Soleimany1,2, Marin Alexe1
1Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
Abstract:
SrTiO3 , 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.
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