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Shape effects of finite-size scaling functions for anisotropic three-dimensional Ising models

Kazuhisa Kaneda-+, Yutaka Okabe-+ and Macoto Kikuchi++

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The finite-size scaling (FSS) functions for anisotropic three-dimensional (3D) Ising models of size L1 × L1 × aL1 (a: anisotropy parameter) are studied by Monte Carlo simulations. We study the a dependence of FSS functions of the Binder parameter g and the magnetization distribution function p(m). We have shown that the FSS functions for p(m) at the critical temperature change from a two-peak structure to a single-peak one by increasing or decreasing a from 1. We also study the FSS near the critical temperature of the layered square-lattice Ising model, when the systems have a large two-dimensional (2D) anisotropy. We have found the 3D and 2D FSS behaviour depending on the parameter which is fixed; a unified view of 3D and 2D FSS behaviour has been obtained for the anisotropic 3D Ising models.


PACS

05.50.+q Lattice theory and statistics (Ising, Potts, etc.)

75.10.Hk Classical spin models

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

05.10.Ln Monte Carlo methods

05.70.Jk Critical point phenomena

MSC

82B27 Critical phenomena

82B20 Lattice systems (Ising, dimer, Potts, etc.) and systems on graphs

82B80 Numerical methods (Monte Carlo, series resummation, etc.) (See also 65-XX, 81T80)

Subjects

Computational physics

Condensed matter: electrical, magnetic and optical

Statistical physics and nonlinear systems

Dates

Issue 42 (22 October 1999)

Received 22 July 1999



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