PERSISTENT PHOTOCONDUCTIVITY IN INSULATING AND SUPERCONDUCTING YBA2CU3OX THIN-FILMS - TEMPERATURE AND SPECTRAL DEPENDENCE

被引：35

作者：

BUDKO, SL

FENG, HH

DAVIS, MF

WOLFE, JC

HOR, PH

机构：

[1] UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204

[2] UNIV HOUSTON,DEPT ELECT ENGN,HOUSTON,TX 77204

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.48.16707

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 approxiamately 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.

引用

页码：16707 / 16713

页数：7

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