Critical adsorption in the undersaturated regime: Scaling and exact results in Ising strips

被引:24
作者
Ciach, A [1 ]
Maciolek, A [1 ]
Stecki, J [1 ]
机构
[1] Polish Acad Sci, Inst Phys Chem, Dept 3, PL-01224 Warsaw, Poland
关键词
D O I
10.1063/1.476002
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Critical adsorption for weak surface field h(1) is reconsidered. On the basis of physical heuristic arguments, approximate behavior of the scaling function is derived. New form of a scaling for weak h(1) in finite systems is proposed and verified by testing against exact results obtained for this purpose in the 2D Ising strips, For weak h(1) we find the approximate behavior of adsorption Gamma similar to tau(beta-Delta 1) for the reduced temperatures h(1)(1/Delta 1)similar to tau much less than 1. This behavior is consistent with experimental data [N. S. Desai, S. Peach, and C. Franck, Phys. Rev. E 52, 4129 (1995)] obtained for tau=10(-5), and is in a very good agreement with exact results in the 2D Ising strip. (C) 1998 American Institute of Physics.
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页码:5913 / 5920
页数:8
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