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题名: Simulating the collapse transition of a two-dimensional semiflexible lattice polymer
作者: Zhou, Jie ;  Ou-Yang, Zhong-Can ;  Zhou, Haijun
刊名: JOURNAL OF CHEMICAL PHYSICS
出版日期: 2008
卷号: 128, 期号:12, 页码:-
关键词: SELF-AVOIDING WALKS ;  2 DIMENSIONS ;  PHASE-TRANSITIONS ;  MONTE-CARLO ;  THETA-POINT ;  COMPUTER-SIMULATION ;  CHAIN ;  MODEL ;  HOMOPOLYMER ;  EXPONENTS
学科分类: Physics
通讯作者: Zhou, J , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
部门归属: [Zhou, J; Ou-Yang, ZC; Zhou, HJ] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: It has been revealed by mean-field theories and computer simulations that the nature of the collapse transition of a polymer is influenced by its bending stiffness epsilon(b). In two dimensions, a recent analytical work demonstrated that the collapse transition of a partially directed lattice polymer is always first order as long as epsilon(b) is positive [H. Zhou et al., Phys. Rev. Lett. 97, 158302 (2006)]. Here we employ Monte Carlo simulation to investigate systematically the effect of bending stiffness on the static properties of a two-dimensional lattice polymer. The system's phase diagram at zero force is obtained. Depending on epsilon(b) and the temperature T, the polymer can be in one of the three phases: crystal, disordered globule, or swollen coil. The crystal-globule transition is discontinuous and the globule-coil transition is continuous. At moderate or high values of epsilon(b) the intermediate globular phase disappears and the polymer has only a discontinuous crystal-coil transition. When an external force is applied, the force-induced collapse transition will either be continuous or discontinuous, depending on whether the polymer is originally in the globular or the crystal phase at zero force. The simulation results also demonstrate an interesting scaling behavior of the polymer at the force-induced globule-coil transition. (C) 2008 American Institute of Physics.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000254537200072
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5556
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhou, Jie,Ou-Yang, Zhong-Can,Zhou, Haijun. Simulating the collapse transition of a two-dimensional semiflexible lattice polymer[J]. JOURNAL OF CHEMICAL PHYSICS,2008,128(12):-.
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