TUNNELING SPECTROSCOPY OF FE-DOPED YBA2CU3O7 SINGLE-CRYSTALS

被引：10

作者：

CUCOLO, AM ^{[1
]}

DILEO, R ^{[1
]}

NIGRO, A ^{[1
]}

LICCI, F ^{[1
]}

机构：

[1] CNR,IST MAT SPECIALI ELETTRON & MAGNETISMO,I-43100 PARMA,ITALY

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.46.9250

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A comparison between the orthorhombic oxygen-deficient YBa2Cu3O7-delta 60-K phase and the tetragonal YBa2(Cu0.96Fe0.04)3O7 system with T(c) = 57 K is made by means of tunnel junctions. No relevant differences are found in the behavior of the high-voltage gaplike structure at almost-equal-to 25 mV while a suppression of the low-voltage structure at almost-equal-to 5 mV is observed in the Fe-doped junctions. In some cases a zero-bias conductance peak is developed; this anomaly is analyzed in the framework of the Appelbaum-Kondo model for electron magnetic interactions.

引用

页码：9250 / 9253

页数：4

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