Particle-hole doping asymmetry in Pb2Sr2YCu3O8-class superconductors
Howard A. Blackstead, John D. Dow
DOI 10.1103/PhysRevB.62.9050 · Physical Review B
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Abstract
Charge transfer in Pb2Sr2YCu3O8 (PSYCO) compounds is evaluated using the self-consistent bond/charge model. When Ce+4 or Am+4 replaces Y+3, the resulting n-type material does not superconduct. When the rare-earth replacing Y is trivalent (e.g., Y+3, Tb+3, or Pr+3) and the PSYCO compound is doped p type (e.g., with >15% Ca), PSYCO exhibits superconductivity. This lack of n−p doping symmetry is inconsistent with most cuprate-plane models of high-temperature superconductivity, but is consistent with oxygen models.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb2Sr2YCu3O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84 | Pressure not reported | unknown |
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