EVIDENCE FOR UNCONVENTIONAL SUPERCONDUCTIVITY IN YBA2CU3O6.9

被引：2
|
作者：
BRAWNER, DA
OTT, HR
机构：
[1] Laboratorium für Festkörperphysik, ETH Hönggerberg
来源：
PHYSICA C | 1994年 / 235卷
关键词：
D O I：
10.1016/0921-4534(94)92155-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report measurements of the dynamic resistance of a de-SQUID formed by two contacts between two different edges of a single crystal of YBa2Cu3O6.9 and a Nb block. The phase of the field induced RD oscillations was compared with those of two adjacent SQUIDs, each formed by two Nb-Nb contacts. We find a phase difference of 160+/-30 degrees between the oscillations of the composite SQUID and those of the SQUIDs formed by Nb-Nb junctions. A possible explanation for this reproducible effect is that the cuprate superconductor has an unconventional order parameter.
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页码：1867 / 1868
页数：2
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