INFRARED QUENCHING OF PHOTOINDUCED PERSISTENT CONDUCTIVITY IN YBA2CU3O6+X

Experimental evidence for infrared quenched photoinduced persistent co nductivity in oxygen deficient YBa2Cu3O6+x films is presented. Results are interpreted in terms of both a charge transfer photoassisted oxyg en ordering model. Infrared illumination of the photoinduced state res ults in detrapping of electrons, a recombination of photogenerated hol es/electrons, and a partial quenching of the photoinduced state. Exper imental results suggest the possibility of optically controlled superc onducting devices in which the superconducting state is generated and quenched with different colors of light. (C) 1996 American Institute o f Physics.