Impurity effects on the stripes in the La-214, Bi-2212 and Y-123 phases
- Conference date: 23-26 July 2000
- Location: Ibaraki (Japan)
Our recent experimental studies on the 1/8 anomaly in the Bi-2212 and Y-123 phases and on the new anomaly at in are reviewed. In the Zn-substituted Bi-2212 and Y-123 phases, we have found anomalous suppression of superconductivity at (the hole concentration per Cu in the plane) ∼1/8, and it has been found from the muon spin relaxation (μ SR) measurements that the magnetic correlation between Cu spins is enhanced singularly at Furthermore, we have found marked suppression of superconductivity singularly at in the 1% Zn-substituted single-crystals of and it has been found from the μ SR measurements that the magnetic correlation is also enhanced at These results suggest that the dynamical stripe correlations of holes and spins exist in the Bi-2212 and Y-123 phases as well as in the La-214 phase and that they tend to be pinned by Zn, leading to the suppression of superconductivity. If this tendency is the case in a wide range of , it is possible to understand the universal results in the high- cuprates that Zn is a strong scatter and that the Zn substitution markedly suppresses superconductivity.
- Hole doped superconductors
- Electron densities of states
- Muon spin relaxation
- Single crystals
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