Infrared quenching of photoinduced persistent conductivity in YBa2Cu3O6+x

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Abstract
Experimental evidence for infrared quenched photoinduced persistent conductivity in oxygen deficient YBa2Cu3O6+x films is presented. Results are interpreted in terms of both a charge transfermodel, in which photogenerated electrons are trapped in oxygen vacancy defects, and a photoassisted oxygen ordering model. Infrared illumination of the photoinduced state results in detrapping of electrons, a recombination of photogenerated holes/electrons, and a partial quenching of the photoinduced state. Experimental results suggest the possibility of optically controlled superconducting devices in which the superconducting state is generated and quenched with different colors of light.

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