Share Email Print
cover

Proceedings Paper

Dramatic evidence of charge-reservoir, polarization-pairing, high-temperature superconductivity
Author(s): John D. Dow; Howard A. Blackstead
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

By simply plotting the critical temperatures Tc for the major superconductors versus the distance d between a cuprate-plane Cu-site and the nearest oxygen site in a charge-reservoir, it becomes apparent that the superconductivity originates in the charge-reservoirs, not in the cuprate planes. By plotting uc versus d, where uc is the amount of impurity Ni or Zn on a Cu-site (presumably in a cuprate-plane) required to suppress Tc to zero, it is evident that pair-breaking requires exponentially more impurities as the cuprate-planes become further from the charge-reservoirs, indicating directly that the superconducting condensate is primarily in the charge- reservoirs, not in the cuprate-planes. The fact that uc(Ni) < uc(Zn) for Nd2-zCezCuO4 indicates that this material is a BCS-like polarization- pairing superconductor, not a spin-fluctuation paired superconductor. The fact that uc(Ni) approximately equals uc(Zn) for most other high-temperature superconductors indicates that the primary superconducting condensate is more distant than the range of the exchange interaction from the cuprate- plane Cu-sites where the impurities reside. The data for YBa2Cu4O8 and for La0.6Ca0.4Ba1.35La0.65Cu3Ox indicate that the behavior of Ni and Zn in YBa2Cu3Ox, uc(Ni) > uc(Zn), is an artifact of different solubilities on different sites, and not evidence of spin-fluctuation- pairing. The trends in the data suggest that there is only one mechanism of high-temperature superconductivity, that the mechanism involves some form of polarization-pairing, and that the superconductivity originates primarily in the charge-reservoirs, not in the cuprate-planes.

Paper Details

Date Published: 5 July 1996
PDF: 9 pages
Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); doi: 10.1117/12.250231
Show Author Affiliations
John D. Dow, Arizona State Univ. (United States)
Howard A. Blackstead, Univ. of Notre Dame (United States)


Published in SPIE Proceedings Vol. 2697:
Oxide Superconductor Physics and Nano-Engineering II
Ivan Bozovic; Davor Pavuna, Editor(s)

© SPIE. Terms of Use
Back to Top