Renormalized couplings and scaling correction amplitudes in the N-vector spin models on the sc and the bcc lattices

Details Renormalized couplings and scaling correction amplitudes in the N-vector spin models on the sc and the bcc lattices Renormalized couplings and scaling correction amplitudes in the N-vector spin models on the sc and the bcc lattices

1998-05-26

arxiv.org/abs/hep-lat/9805025v1

Phys.Rev. B58 (1998) 11552-11569

Physics

High Energy Physics

High Energy Physics - Lattice

23 pages, latex, no figures

Scientific paper

10.1103/PhysRevB.58.11552

For the classical N-vector model, with arbitrary N, we have computed through order \beta^{17} the high temperature expansions of the second field derivative of the susceptibility \chi_4(N,\beta) on the simple cubic and on the body centered cubic lattices. (The N-vector model is also known as the O(N) symmetric classical spin Heisenberg model or, in quantum field theory, as the lattice O(N) nonlinear sigma model.) By analyzing the expansion of \chi_4(N,\beta) on the two lattices, and by carefully allowing for the corrections to scaling, we obtain updated estimates of the critical parameters and more accurate tests of the hyperscaling relation d\nu(N) +\gamma(N) -2\Delta_4(N)=0 for a range of values of the spin dimensionality N, including N=0 [the self-avoiding walk model], N=1 [the Ising spin 1/2 model], N=2 [the XY model], N=3 [the classical Heisenberg model]. Using the recently extended series for the susceptibility and for the second correlation moment, we also compute the dimensionless renormalized four point coupling constants and some universal ratios of scaling correction amplitudes in fair agreement with recent renormalization group estimates.

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