A. Gilabert et al., PHOTOINDUCED ENHANCEMENT OF THE JOSEPHSON EFFECT IN YBACUO GRAIN-BOUNDARY JUNCTIONS, Journal of low temperature physics, 106(3-4), 1997, pp. 255-264
Experiments of persistent photoinduced enhancement of the Josephson ef
fect in YBaCuO junctions are reviewed in this paper. These experiments
show that the critical current and the conductivity of these Josephso
n junctions can be increased after illumination. This effect is due to
photodoping of the oxygen depleted region in the week link.