Quasiparticle tunneling properties of planar YBa2Cu3O7-delta/PrBa2Cu3O7-delta/HoBa2CU3O7-delta heterostructures

被引：36

作者：

Cucolo, AM ^{[1
]}

DiLeo, R ^{[1
]}

Nigro, A ^{[1
]}

Romano, P ^{[1
]}

Bobba, F ^{[1
]}

Bacca, E ^{[1
]}

Prieto, P ^{[1
]}

机构：

[1] UNIV VALLE,DEPT FIS,CALI 25360,COLOMBIA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.76.1920

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a demonstration of S-I-S quasiparticle tunneling in c-axis oriented planar junctions consisting of YBaCuO/PrBaCuO/HoBaCuO thin film heterostructures. In the conductance curves at low temperatures well developed peaks indicative of gap structures are found at +/-45 mV. The high bias conductance shows flat dependence on energy and the best quality junction has a zero-bias conductance less than 0.05 of the normal state value. We discuss our spectra in the framework of a BCS-like density of states as well as in terms of a d(x)(2)-(2)(y) symmetry of the superconducting order parameter.

引用

页码：1920 / 1923

页数：4

共 28 条

[1] ALL A-AXIS ORIENTED YBA2CU3O7-Y-PRBA2CU3O7-Z-YBA2CU3O7-Y JOSEPHSON DEVICES OPERATING AT 80-K [J].