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Comparison of the Hole Conductivities in Ceramic Cuprate Semiconductors and High-Tc Superconductors, as Reflected in the Difference between Oxygen and Copper Madelung Site Potentials

Published online by Cambridge University Press:  21 February 2011

Robert K. Metzger  and
Jerry B. Torrance
Robert K. Metzger
Affiliation:
Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama, 35487-0336, USA
Jerry B. Torrance
Affiliation:
IBM Research Divison, Almaden Research Center, 650 Harry Road, San Jose, CA 95120-6099, USA
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Abstract

The Madelung energies of 18 cuprates and 1 nickelate with sheets or chains of Cu and O have been computed, along with the relevant Madelung site potentials for O and Cu. The difference between these site potentials has been shown to correlate extremely well with the conductivity of these cuprates: only if the site potential difference is intermediate can the holes (the presumed charge carriers) move more easily between Cu and O sites in the CuO2 sheets.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 156: Symposium M – High Temperature Superconductors: Relationships Between Properties, Structure, and Solid State Chemistry , 1989 , 377
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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