Universality in the partially anisotropic three-dimensional Ising lattice

Details Universality in the partially anisotropic three-dimensional Ising lattice Universality in the partially anisotropic three-dimensional Ising lattice

2004-10-25

arxiv.org/abs/cond-mat/0410629v1

Zh. Exp. Teor. Fiz. (ZhETF) 126 (2004) 619-624; J. Exp. Theor. Phys. (JETP) 99 (2004) 539-543

Physics

Condensed Matter

Statistical Mechanics

11 pages in latex; no figures

Scientific paper

10.1134/1.1809682

Using transfer-matrix extended phenomenological renormalization-group methods the critical properties of spin-1/2 Ising model on a simple-cubic lattice with partly anisotropic coupling strengths ${\vec J}=(J',J',J)$ are studied. Universality of both fundamental critical exponents $y_t$ and $y_h$ is confirmed. It is shown that the critical finite-size scaling amplitude ratios $U=A_{\chi^{(4)}}A_\kappa/A_\chi^2$, $Y_1=A_{\kappa^{''}}/A_\chi$, and $Y_2=A_{\kappa^{(4)}}/A_{\chi^{(4)}}$ are independent of the lattice anisotropy parameter $\Delta=J'/J$. By this for the last above invariant of the three-dimensional Ising universality class we give the first quantitative estimate: $Y_2\simeq2.013$ (shape $L\times L\times\infty$, periodic boundary conditions in both transverse directions).

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