Nonsinusoidal current-phase relationship of grain boundary Josephson junctions in high-Tc superconductors

被引：73
|
作者：
Il'ichev, E
Zakosarenko, V
Ijsselsteijn, RPJ
Schultze, V
Meyer, HG
Hoenig, HE
Hilgenkamp, H
Mannhart, J
机构：
[1] Inst Phys High Technol, Dept Cryoelect, D-07702 Jena, Germany
[2] Univ Augsburg, Inst Phys, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.81.894
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
For various configurations of Josephson junctions incorporating superconductors with unconventional ;order parameter symmetry, such as most high-T-c cuprates, deviations from the standard sinusoidal current-phase dependence have been predicted. To this point, these deviations have never been observed experimentally. We have measured the current-phase relation of high-T-c Josephson junctions, namely, YBa2Cu3O7-x thin film bicrystals, comprising symmetric 45 degrees [001] tilt grain boundaries. The current-phase relations of all junctions investigated were found to be extremely nonharmonic, in agreement with a d(x)2(-y)2-wave dominated symmetry of the order parameter.
引用
收藏
页码：894 / 897
页数：4
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