Correlation function approach to multicomponent systems: Three-body potentials in ternary alloys
- 15 March 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 19 (6) , 2895-2904
- https://doi.org/10.1103/physrevb.19.2895
Abstract
With the use of the correlation function approach to multicomponent systems, the transition temperature is calculated within the mean-field approximation for a ternary alloy having arbitrary two-body and three-body interactions and arbitrary concentrations. This expression is studied in certain limiting cases. The concept of an effective concentration-dependent two-body interaction caused by the presence of three-body potentials is given justification. However, as has been pointed out for binary alloys and for mean-field approximations in general, this concept loses validity as the system approaches criticality and long-range correlations become dominant.Keywords
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