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Vacancy Ordering in the Basal Plane of YB2Cu3Oz

Published online by Cambridge University Press:  28 February 2011

L. T. Wille ,
A. Berera ,
D. De Fontaine  and
S. C. Moss
L. T. Wille
Affiliation:
Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720
A. Berera
Affiliation:
Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720 Department of Physics, University of California, Berkeley, CA 94720
D. De Fontaine
Affiliation:
Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720 Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720
S. C. Moss
Affiliation:
Department of Physics, University of Houston, TX 77004
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Abstract

The ordering in the Cu-O basal plane of the high Tc superconductor YBa2Cu3Oz is investigated. Asymmetric pairwise interactions between nearest and next nearest neighbors are assumed. Ordering instabilities in two-dimensional k-space are mapped out as a function of the interactions and the ordered ground state superstructures consisting of occupied and empty oxygen sites are determined. A temperature-composition phase diagram is calculated by means of the Cluster Variation Method. The thermodynamic behavior of the superconducting compound is discussed in the light of these results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 535
Copyright
Copyright © Materials Research Society 1988

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References

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