期刊
PHYSICAL REVIEW LETTERS
卷 95, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.95.195703
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Grand-canonical simulations designed to resolve critical universality classes are reported for z1 hard-core electrolyte models with diameter ratios lambda=a(+)/a(-)less than or similar to 6. For z=1 Ising-type behavior prevails. Unbiased estimates of T-c(lambda) are within 1% of previous (biased) estimates but the critical densities are similar to 5% lower. Ising character is also established for the 21 and 31 equisized models, along with critical amplitudes and improved T-c estimates. For z=3, however, strong finite-size effects reduce the confidence level although classical and O(n >= 3) criticality are excluded.
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