Critical universality and hyperscaling revisited for Ising models of general spin using extended high-temperature series

Details Critical universality and hyperscaling revisited for Ising models of general spin using extended high-temperature series Critical universality and hyperscaling revisited for Ising models of general spin using extended high-temperature series

2001-12-23

arxiv.org/abs/hep-lat/0112049v1

Phys.Rev. B65 (2002) 144431

Physics

High Energy Physics

High Energy Physics - Lattice

35 pages, latex, 21 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.65.144431

We have extended through beta^{23} the high-temperature expansion of the second field derivative of the susceptibility for Ising models of general spin, with nearest-neighbor interactions, on the simple cubic and the body-centered cubic lattices. Moreover the expansions for the nearest-neighbor correlation function, the susceptibility and the second correlation moment have been extended up to beta^{25}. Taking advantage of these new data, we can improve the accuracy of direct estimates of critical exponents and of hyper-universal combinations of critical amplitudes such as the renormalized four-point coupling g_r or the quantity usually denoted by R^{+}_{xi}. We have used a variety of series extrapolation procedures and, in some of the analyses, we have assumed that the leading correction-to-scaling exponent theta is universal and roughly known. We have also verified, to high precision, the validity of the hyperscaling relation and of the universality property both with regard to the lattice structure and to the value of the spin.

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