Photoinduced changes in the transport properties of oxygen-deficient YBa2Cu3Ox

NIEVA, G.; OSQUIGUIL, E.; GUIMPEL, J.; MAENHOUDT, M.; WUYTS, B.; BRUYNSERAEDE, Y.; MAPLE, M.B.; SCHULLER, IVAN K.

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

American Physical Society

Año: 1992 vol. 46 p. 14249 - 14252

0163-1829

We show that illumination of oxygen-deficient metallic YBa2Cu3Ox films produces a change in the Hall coefficient, an increase in the critical temperature, and a decrease in the electrical resistivity. These changes relax to equilibrium with characteristic times of the order of days, and are due to variations in both the carrier density and mobility. The relaxation times are of the same order of magnitude as the ones measured in nonilluminated oxygen-deficient films immediately after quenching. © 1992 The American Physical Society.