Angular dependence of the symmetry of the order parameter in YBa2Cu3O7-delta

被引：6

作者：

Gim, Y

Mathai, A

Black, R

Amar, A

Wellstood, FC

机构：

[1] Center for Superconductivity Research, Department of Physics, University of Maryland

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期

关键词：

D O I：

10.1109/77.621706

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Using a 4.2 K scanning SQUID we examined twinned thin-film YBa2Cu3O7-delta (YBCO)-Ag-PbIn SQUIDs and measured the phase of the order parameter in the YBCO for 13 different tunneling angles, We have found that the order parameter in YBCO is time-reversal symmetric and shows a d(x2-y2)-pairing symmetry, provided the junctions are properly made. Detailed analysis of our data reveals that any time-reversal breaking component is less than 5%, which rules out states such as d(x2-y2) + is or d(x2-y2) + id(xy).

引用

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页码：2331 / 2334

页数：4

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