CHAIN SCENARIO FOR JOSEPHSON TUNNELING WITH PI-SHIFT IN YBA2CU3O7

被引:28
作者
MAZIN, II
GOLUBOV, AA
ZAIKIN, AD
机构
[1] FORSCHUNGSZENTRUM JULICH, INST SCHICHT & IONENTECH, JULICH, GERMANY
[2] UNIV KARLSRUHE, INST THEORET FESTKORPERPHYS, D-76128 KARLSRUHE, GERMANY
关键词
D O I
10.1103/PhysRevLett.75.2574
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We point out that all current Josephson-junction experiments probing directly the symmetry of the superconducting state in YBa(2)Cu3O(7) can be interpreted in terms of the bilayer antiferromagnetic spin fluctuation model, which renders the superconducting state with the order parameters of extended s symmetry, but with the opposite signs in the bonding and antibonding Cu-O plane bands. The essential part of our interpretation includes the Cu-O chain band which would have the order parameter of the same sign as antibonding plane band. We show that in this case net Josephson currents along and perpendicular to the chains have a phase shift equal to pi.
引用
收藏
页码:2574 / 2577
页数:4
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