MEAN-FIELD THEORY OF POLYMER MELTING

被引:22
作者
BASCLE, J
GAREL, T
ORLAND, H
机构
[1] Service de Phys. Theor., CE-Saclay, Gif-sur-Yvette
来源
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1992年 / 25卷 / 23期
关键词
D O I
10.1088/0305-4470/25/23/010
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the Flory model for the melting of a semiflexible polymer chain on a lattice. Using a field theoretical representation of the partition function, we propose a new mean-field theory. Within this theory, the system undergoes a first-order transition at temperature T(c), between a liquid-like phase at temperature T > T(c) and an ordered (almost stretched) phase at T < T(c), in agreement with the original Flory idea. In addition, we find a disorder point T(D) (> T(c)), separating two liquid phases with different short-range correlations. For T > T(D), the short-range correlations are isotropic, whereas for T < T(D), one-dimensional short-range order sets in. This disorder point may be relevant to the glass transition.
引用
收藏
页码:L1323 / L1329
页数:7
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