Lattice-switching Monte Carlo method for crystals of flexible molecules.

Lattice-switching Monte Carlo method for crystals of flexible molecules.
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用于柔性分子晶体的晶格切换蒙特卡罗方法。

DOI:
10.1103/physreve.90.063313
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发表时间:
2014
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
Bridgwater S
Bridgwater S
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--
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作者:
Bridgwater S

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我们讨论了格点切换蒙特卡罗方法(LSMC)作为两个同步马尔可夫链之间的二进制抽样的实现,以探索势能景观中的分离极小值。当以这种方式表示时,对更复杂的晶体的概括是直接的。我们将LSMC方法扩展到一个灵活的直链烷烃模型,考虑了键长和角度约束。在这个模型中,我们准确地定位了两种不同晶型的丁烷随着密度的增加而发生的转变,并建议将此作为其他自由能方法的基准问题。
We discuss implementation of the lattice-switching Monte Carlo method (LSMC) as a binary sampling between two synchronized Markov chains exploring separated minima in the potential energy landscape. When expressed in this fashion, the generalization to more complex crystals is straightforward. We extend the LSMC method to a flexible model of linear alkanes, incorporating bond length and angle constraints. Within this model, we accurately locate a transition between two polymorphs of-butane with increasing density, and suggest this as a benchmark problem for other free-energy methods.
DOI: 10.1002/9781118755815.ch03
发表时间: 2014
影响因子: --
作者:
V. Agarwal;B. Peters
通讯作者: B. Peters