INFLUENCE OF THE OXYGEN-CONTENT ON THE TUNNELING CHARACTERISTICS OF YBA2CU3O7-DELTA

被引：14

作者：

CUCOLO, AM ^{[1
]}

DILEO, R ^{[1
]}

ROMANO, P ^{[1
]}

SCHNEEMEYER, LF ^{[1
]}

WASZCZAK, JV ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.44.2857

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have formed planar tunnel junctions between Pb films and YBa2Cu3O7-delta single crystals with different surface oxygen stoichiometries. Oxygen losses have been induced by heating the crystals at 400-degrees-C in vacuum for different times. Low-leakage tunnel junctions have also been obtained in the case of the most "degraded" samples. As the oxygen deficiency increases, the Y-Ba-Cu-O gaplike structure gradually broadens and shifts towards higher energies. For thermally untreated samples, tunneling spectroscopy gives information on the local T(c).

引用

页码：2857 / 2860

页数：4

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