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An Ising model approach to the problem of oxygen ordering in the basal plane of YBa2Cu3O6 + 2c

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  • Matic, V.M.

Abstract

Oxygen ordering in the basal plane of the YBa2Cu3O6 + 2c system can be described in terms of the two-dimensional Ising model with asymmetric next-nearest-neighbor interactions. The phase diagram is calculated by means of a cluster variation method, using the values of interaction energies which follow from the linear muffin-tin orbital (LMTO) method, and compared with previous known results. The low-temperature structure is examined and it is found that O-Cu-O chains consist of oxygen occupied and uncopied segments. The average number of oxygen atoms in oxygen occupied segments is calculated as a function of temperature T and concentration c.

Suggested Citation

  • Matic, V.M., 1992. "An Ising model approach to the problem of oxygen ordering in the basal plane of YBa2Cu3O6 + 2c," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 184(3), pages 571-586.
    • Handle: RePEc:eee:phsmap:v:184:y:1992:i:3:p:571-586
    DOI: 10.1016/0378-4371(92)90323-I
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