Abstract

The phenomenon of persistent photoconductivity in YBa 2Cu 3O 6+ x ( x ≈ 0.4) films near the semiconductor-metal transition has been studied. Transport and magnetic measurements of the illuminated films were performed. The transition to the metallic state and photoinduced superconductivity have been observed. The mechanism of persistent photoconductivity in reduced YBa 2Cu 3O 6+ x films is also discussed.

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