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Two‐Spin Cluster Approximation in the Blume‐Capel Model
Author(s) -
Lock S. L.,
Lee B. S.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221240218
Subject(s) - cluster (spacecraft) , tricritical point , spin (aerodynamics) , cluster expansion , condensed matter physics , perturbation (astronomy) , physics , perturbation theory (quantum mechanics) , spin model , statistical physics , mathematics , quantum mechanics , thermodynamics , computer science , phase diagram , programming language , phase (matter)
A two‐spin cluster approximation based on a perturbation expansion of the free energy in powers of the order parameter is applied to calculate the properties of the Blume‐Capel model. The results obtained for the tricritical point are comparable to those of other two‐spin‐type cluster approximations.