2006
DOI: 10.1088/0305-4470/39/18/010
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Geometric effects on critical behaviours of the Ising model

Abstract: We investigate the critical behaviour of the two-dimensional Ising model defined on a curved surface with a constant negative curvature. Finite-size scaling analysis reveals that the critical exponents for the zero-field magnetic susceptibility and the correlation length deviate from those for the Ising lattice model on a flat plane. Furthermore, when reducing the effects of boundary spins, the values of the critical exponents tend to those derived from the mean field theory. These findings evidence that the u… Show more

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Cited by 60 publications
(84 citation statements)
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“…More importantly, in the latter model, the surface curvature effects manifest themselves in scaling behavior in a different way from that in the donut-shaped Ising model. In what follows, we will give a brief review of our previous study on the Ising model on the pseudosphere [37,38]. By comparing the results obtained for the two distinct curved surfaces, we gain a deeper understanding of the effect of geometry on the Ising model.…”
Section: Ising Models On Negatively Curved Surfacesmentioning
confidence: 99%
“…More importantly, in the latter model, the surface curvature effects manifest themselves in scaling behavior in a different way from that in the donut-shaped Ising model. In what follows, we will give a brief review of our previous study on the Ising model on the pseudosphere [37,38]. By comparing the results obtained for the two distinct curved surfaces, we gain a deeper understanding of the effect of geometry on the Ising model.…”
Section: Ising Models On Negatively Curved Surfacesmentioning
confidence: 99%
“…This structure has been verified having a nontrivial impact on the critical behavior of many models of statistical physics. For example, in the context of the Ising model, significant shifts in static and dynamic critical exponents toward the mean-field values were noticed [1,2]; small-sized ferromagnetic domains were observed to exist at temperatures far greater than the critical temperature [4]; An apparent zero-temperature orientational glass transition in the XY spin model on a negatively curved surface was recently demonstrated [6].…”
Section: Introductionmentioning
confidence: 99%
“…This argument is based on the fact that a negatively curved surface contains a huge amount of boundary points: that is, for a negatively curved surface, the ratio of surface area to perimeter (which is the * Corresponding author, E-mail: beomjun@skku.edu two-dimensional example of the so-called surface-volume ratio in general dimension) remain nonvanishing even in the large-system limit. Since it was pointed out that a system may have a novel behavior due to the presence of a nonvanishing boundary [7], there have been ongoing studies to clarify this issue [4,6,[8][9][10][11]. While the boundary effects can be sometimes excluded, for example, by using a periodic boundary condition [12] or by mathematical abstractions [5,[13][14][15], it is often crucial to understand how a boundary affects the physical properties since it may give the most important contribution to an observed behavior as will be explained in this work.…”
Section: Introductionmentioning
confidence: 99%