Observation of quasiparticle Andreev bound states using YBa2Cu3O7-y/Ag ramp-edge junctions with different interface geometries

被引：90

作者：

Wang, W

Yamazaki, M

Lee, KJ

Iguchi, I

机构：

[1] Tokyo Inst Technol, Dept Appl Phys, Meguro Ku, Tokyo 1528551, Japan

[2] Japan Sci & Technol Corp, CREST, Meguro Ku, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.60.4272

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements on quasiparticle tunneling using YBa2Cu3O7 - y, (YBCO)/Ag ramp-edge junctions. The tunnel direction was toward the CuO2 planes. Two junctions with different tilted angles between the a axis of YBCO and the junction boundary were fabricated on the same substrate simultaneously. For the junctions with the tilted angle of 45 degrees, the zero-bias conductance peak (ZBCP) was observed. On the contrary, for those fabricated with the tilted angle of 0 degrees, a dip structure around zero bias was mostly observed. The results are consistent with the recent studies on the Andreev reflection between a d(x2 - y2)-wave superconductor and a normal metal. The dependencies of ZBCP on temperature and magnetic field are also presented. [S0163-1829(99)01130-3].

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页码：4272 / 4276

页数：5

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