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Four particle cluster approximation for the Maier-Saupe model of the isotropic-nematic phase transition

By R. van der Haegen, J. Debruyne, R. Luyckx and H.N.W. Lekkerkerker

Abstract

The cluster variation theory for the Maier-Saupe model of the isotropic-nematic phase transition is extended to the four-particle level. As in the case of the Heisenberg ferromagnet, the irregularities of the three-particle cluster approximation applied to cubic lattices, where there are no triangles of nearest neighbors, disappear. The extension from three- to four-particle clusters yields improved values of all quantities, characteristic for the phase transition

Topics: Scheikunde
Year: 1980
OAI identifier: oai:dspace.library.uu.nl:1874/22434

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