PHASE-TRANSITIONS IN FRACTAL POROUS-MEDIA

被引：32

作者：

MACHTA, J

机构：

[1] Department of Physics and Astronomy, University of Massachusetts, Amherst

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.66.169

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Phase transitions in fractal porous media are studied using a spin model with correlated dilution parametrized by a microscopic porosity p and a Hausdorf dimension D. For D > D(crit) there is a percolation transition for the pore space at some p(c) and, for p > p(c), the spins in the pore space exhibit two critical points at the bulk transition temperature, T(c0) and at T(c) < T(c0). The correlation-length exponent at T(c) is larger than the corresponding pure system. The qualitative features of the model resemble those of the superfluid transition in aerogel.

引用

页码：169 / 172

页数：4

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