EVIDENCE FOR D(X2-Y2) PAIRING FROM THE MAGNETIC-FIELD MODULATION OF YBA2CU3O7-PB JOSEPHSON-JUNCTIONS

被引：338

作者：

WOLLMAN, DA ^{[1
]}

VANHARLINGEN, DJ ^{[1
]}

GIAPINTZAKIS, J ^{[1
]}

GINSBERG, DM ^{[1
]}

机构：

[1] UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.74.797

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the magnetic field modulation of the critical current of YBCO-Au-Pb Josephson junctions fabricated on the a and b edges and straddling the a-b corners of YBCO single crystals. In corner junctions, the critical current drops sharply at zero applied field and increases as the field is increased in either direction, in sharp contrast to the Fraunhofer diffraction patterns observed for single edge junctions. This behavior signifies a sign change of the order parameter between the a and b directions, strong direct evidence that the superconducting pairing state of YBCO has dx2-y2 symmetry. © 1995 The American Physical Society.

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页码：797 / 800

页数：4

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