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Critical behavior of the specific heat for pure and site-diluted simple cubic Ising systems

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Abstract

The exponentα of the specific heatC is determined for the pure and the site-diluted simple cubic Ising model (concentrationx=0, 0.2, 0.4 of nonmagnetic sites) by a finite-size scaling analysis of the peak value Cmax(L) for systems of linear dimensionsL=8, 16, 32, and 64. The Cmax values are obtained by the Ferrenberg-Swendsen algorithm, using Monte Carlo data from a fully-vectorized multi-spin coding program. We obtain α=0.11 for x=0 and a crossover to a negativeα value upon dilution, with α=−0.029(4) both forx=0.2 andx=0.4.

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Authors and Affiliations

  1. Institut für Physik, Max-Planck-Institut für Metallforschung, 7000, Stuttgart 80, Germany

    A. Weyersberg, T. Holey & M. Fähnle

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  1. A. Weyersberg
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  2. T. Holey
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  3. M. Fähnle
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Weyersberg, A., Holey, T. & Fähnle, M. Critical behavior of the specific heat for pure and site-diluted simple cubic Ising systems. J Stat Phys 66, 133–138 (1992). https://doi.org/10.1007/BF01060063

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  • DOI: https://doi.org/10.1007/BF01060063

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