An extended scaling analysis of the S=1/2 Ising ferromagnet on the simple cubic lattice

Details An extended scaling analysis of the S=1/2 Ising ferromagnet on the simple cubic lattice An extended scaling analysis of the S=1/2 Ising ferromagnet on the simple cubic lattice

2010-10-29

arxiv.org/abs/1010.6244v3

Phys. Rev. B 83 (2011) 014411

Physics

Condensed Matter

Statistical Mechanics

16 pages, 17 figures

Scientific paper

It is often assumed that for treating numerical (or experimental) data on continuous transitions the formal analysis derived from the Renormalization Group Theory can only be applied over a narrow temperature range, the "critical region"; outside this region correction terms proliferate rendering attempts to apply the formalism hopeless. This pessimistic conclusion follows largely from a choice of scaling variables and scaling expressions which is traditional but which is very inefficient for data covering wide temperature ranges. An alternative "extended caling" approach can be made where the choice of scaling variables and scaling expressions is rationalized in the light of well established high temperature series expansion developments. We present the extended scaling approach in detail, and outline the numerical technique used to study the 3d Ising model. After a discussion of the exact expressions for the historic 1d Ising spin chain model as an illustration, an exhaustive analysis of high quality numerical data on the canonical simple cubic lattice 3d Ising model is given. It is shown that in both models, with appropriate scaling variables and scaling expressions (in which leading correction terms are taken into account where necessary), critical behavior extends from Tc up to infinite temperature.

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