Dopant interactions in superconducting YBa2Cu3O7
M. A. Castro, S. M. Durbin, M. McElfresh
DOI 10.1103/PhysRevB.50.13744 · Physical Review B
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Abstract
The suppression of Tc by pairs of dopants which substitute for Cu in superconducting YBa2[Cu0.95(MxN1−x)0.05]3O7−δ (MxN1−x= NixZn1−x,GaxZn1−x,GaxNi1−x, FexZn1−x) is found to be nonlinear in the concentration x when the dopants occupy both of the inequivalent Cu sites, indicating a strong interlayer coupling. The response is distinctly different for magnetic and nonmagnetic ions. The large suppression due to Zn ions is shown to be correlated with a similar increase in hole density, which is relevant for comparing current theories of s-wave and d-wave superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
| YBa2[Cu0.95(Ni0.05)0.05]3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 72 | Pressure not reported | unknown |
| YBa2[Cu0.95(Zn0.05)0.05]3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 42 | Pressure not reported | unknown |
| YBa2[Cu0.95(Ga0.05)0.05]3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 76 | Pressure not reported | unknown |
| YBa2[Cu0.95(Fe0.05)0.05]3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 73 | Pressure not reported | unknown |
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