Stretching of a polymer below the θ point -: art. no. 088301

被引：70
作者：
Marenduzzo, D
Maritan, A
Rosa, A
Seno, F
机构：
[1] SISSA, I-34014 Trieste, Italy
[2] INFM, I-34014 Trieste, Italy
[3] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
[4] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy
[5] INFM, I-35131 Padua, Italy
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.90.088301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The unfolding of a polymer below the theta point when pulled by an external force is studied both in d=2 on the lattice and in d=3 off the lattice. At T=0 and for finite length chains, it is found that the globule unfolds via multiple steps, corresponding to transitions between different minima, in both cases. In d=3 one of these intermediates is a regular helix. In the infinite length limit, these steps have a qualitative effect only in d=2. The phase diagram in d=2 is determined via the transfer matrix. To rationalize these results, energy-entropy and renormalization group arguments are given.
引用
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页码：1 / 088301
页数：4
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