Properties of superconductor-antiferromagnet-superconductor Josephson junctions in SO(5) theory
- 1 May 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 59 (18) , R11645-R11648
- https://doi.org/10.1103/physrevb.59.r11645
Abstract
We derive the qualitative behavior of superconductor-antiferromagnet-superconductor (SAS) Josephson junctions described by Zhang’s SO(5) theory. The main differences between these junctions and conventional superconductor-insulator-superconductor junctions arise from the nonsinusoidal current-phase relation derived by Demler et al. for thin SAS junctions. Using a simple approximation to this nonsinusoidal function, the current voltage relation, Shapiro steps, thermal fluctuation effects, and the diffraction pattern in a magnetic field are obtained.Keywords
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