PAIRING SYMMETRY AND FLUX-QUANTIZATION IN A TRICRYSTAL SUPERCONDUCTING RING OF YBA2CU3O7-DELTA

被引：954

作者：

TSUEI, CC ^{[1
]}

KIRTLEY, JR ^{[1
]}

CHI, CC ^{[1
]}

YUJAHNES, LS ^{[1
]}

GUPTA, A ^{[1
]}

SHAW, T ^{[1
]}

SUN, JZ ^{[1
]}

KETCHEN, MB ^{[1
]}

机构：

[1] IBM CORP, THOMAS J WATSON RES CTR, YORKTOWN HTS, NY 10598 USA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.73.593

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have used the concept of flux quantization in superconducting YBa2Cu3O7-delta rings with 0, 2, and 3 grain-boundary Josephson junctions to test the pairing symmetry in high-T(c) superconductors. The magnetic flux threading these rings at 4.2 K is measured by employing a scanning superconducting quantum interference device microscope. Spontaneous magnetization of a half magnetic flux quantum, PHI0/2 = h/4e has been observed in the 3-junction ring, but not in the 2-junction rings. These results are consistent with d-wave pairing symmetry.

引用

页码：593 / 596

页数：4

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