Persistent photoconductivity in insulating and superconducting YBa2Cu3Ox thin films: Temperature and spectral dependence
S. L. Bud’ko, H. H. Feng, M. F. Davis, J. C. Wolfe, P. H. Hor
DOI 10.1103/PhysRevB.48.16707 · Physical Review B
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Abstract
Temperature and spectral dependencies of photoinduced changes of resistance in YBa2Cu3Ox thin films with oxygen content ranging as 6.35<x<6.75 were measured on both sides of the metal-insulator transition (MIT). The absolute value of efficiency of initiation of photoinduced changes decreases with an increase of oxygen content, but the position of peaks in the spectral dependence does not change with a change of x. Temperature dependencies of efficiency have an anomaly at T∼220 K, which is present in all the samples studied and correlates with anomalies observed by other experimental techniques. Qualitatively similar temperature and spectral dependencies of efficiency for the samples in both the insulating and metallic phases may be considered as an indication that the persistent photoconductivity effect in Y-Ba-Cu-O on both sides of the MIT has a common origin.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure not reported | unknown |
| YBa2Cu3O6.65 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30.2 | Pressure not reported | zero_resistance |
| YBa2Cu3O6.72 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 43.5 | Pressure not reported | zero_resistance |
| YBa2Cu3O6.75 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 48.8 | Pressure not reported | zero_resistance |
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