Angle-resolved Andreev bound states in anisotropic d-wave high-Tc, YBa2Cu3O7-y superconductors

被引：156

作者：

Iguchi, I ^{[1
]}

Wang, W

Yamazaki, M

Tanaka, Y

Kashiwaya, S

机构：

[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

[2] Tokyo Inst Technol, JST, CREST, Tokyo 1528551, Japan

[3] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[4] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.62.R6131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An unusual technique utilizing the two-dimensional junction configuration is introduced to study the pairing symmetry of a YBa2Cu3O7-y cuprate superconductor. The zero bias conductance peak due to the Andreev bound states was measured for the YBa2Cu3O7-y/I/Ag ramp-edge tunnel junctions with different crystal-interface boundary angles fabricated on the same chip. It was found to develop monotonically as the angle was increased and became a maximum at 45 degrees. Two gaplike structures were also found at the intermediate angle of 30 degrees. The result implies that d(x2-y2)-wave pairing symmetry predominates in this cuprate.

引用

页码：R6131 / R6134

页数：4

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