Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-05-15
J. Stat. Mech. (2009) P07030
Physics
Condensed Matter
Statistical Mechanics
7 pages, 10 figures, Published version; in J. Stat. Mech. (2009)
Scientific paper
10.1088/1742-5468/2009/07/P07030
Extensive Monte Carlo study of two-dimensional Ising model is done to investigate the statistical behavior of spin clusters and interfaces as a function of temperature, $T$. We use a \emph{tie-breaking} rule to define interfaces of spin clusters on square lattice with strip geometry and show that such definition is consistent with conformal invariant properties of interfaces at critical temperature, $T_c$. The \emph{effective} fractal dimensions of spin clusters and interfaces ($d_c$ and $d_I$, respectively) are obtained as a function of temperature. We find that the effective fractal dimension of the spin clusters behaves almost linearly with temperature in three different regimes. It is also found that the effective fractal dimension of the interfaces undergoes a sharp crossover around $T_c$, between values 1 and 1.75 at low and high temperatures, respectively. We also check the finite-size scaling hypothesis for the percolation probability and the average mass of the largest spin-cluster in a good agreement with the theoretical predictions.
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