Title: Effective-field methods for magnetic systems
Authors: Kamieniarz, G ×
Dekeyser, Raf
Musial, G #
Issue Date: Feb-1994
Publisher: Państwowe Wydawnictwo Naukowe
Series Title: Acta Physica Polonica A vol:85 issue:2 pages:413-417
Abstract: The self-consistency conditions inherent in the mean-field approximation are extended to take into account some pair correlations. It is shown that this extension is systematically improvable and applicable to the spin systems with short-range interactions in the entire temperature region. With two correlations included and the renormalization-group ideas implemented, the critical properties of the Ising model are satisfactorily revealed. Moreover, the improved estimates of the thermodynamical quantities for the quantum linear XY model from the finite-size calculations are found down to very low temperatures.
ISSN: 0587-4246
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
× corresponding author
# (joint) last author

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