Particle-hole doping asymmetry in Pb{sub 2}Sr{sub 2}YCu{sub 3}O{sub 8}-class superconductors
Charge transfer in Pb{sub 2}Sr{sub 2}YCu{sub 3}O{sub 8} (PSYCO) compounds is evaluated using the self-consistent bond/charge model. When Ce{sup +4} or Am{sup +4} replaces Y{sup +3}, the resulting n-type material does not superconduct. When the rare-earth replacing Y is trivalent (e.g., Y{sup +3}, Tb{sup +3}, or Pr{sup +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.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205606
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 13 Vol. 62; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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