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arXiv 2007.12427cond-mat.softcond-mat.stat-mechnlin.PS
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二元软物质混合物中准晶的形成

Quasicrystal formation in binary soft matter mixtures

A. Scacchi, W. R. C. Somerville, D. M. A. Buzza, A. J. Archer

摘要:

使用的策略,可应用于理论或实验中,我们确定的制度,其中一个模型二元软物质混合物形成准晶体。采用经典的密度泛函理论结合积分方程理论对体系进行了描述。准晶的形成需要两种特征长度尺度的粒子以特定的比例有序排列。对于单组分系统,长度尺度与对相互作用的形式如何相关是相当好理解的,但对于混合物则知之甚少。在我们的模型中,大小胶体的混合物被限制在一个界面上,这两个长度尺度分别来自于大颗粒对之间的相互作用范围和交叉的大小相互作用。小-小长度尺度不显著。我们的战略,寻找准晶涉及到调谐位置的最大值的色散关系,或相当于在液体状态的部分静态结构因素。

英文摘要:

Using a strategy that may be applied in theory or in experiments, we identify the regime in which a model binary soft matter mixture forms quasicrystals. The system is described using classical density functional theory combined with integral equation theory. Quasicrystal formation requires particle ordering with two characteristic lengthscales in certain particular ratios. How the lengthscales are related to the form of the pair interactions is reasonably well understood for one component systems, but less is known for mixtures. In our model mixture of big and small colloids confined to an interface, the two lengthscales stem from the range of the interactions between pairs of big particles and from the cross big-small interactions, respectively. The small-small lengthscale is not significant. Our strategy for finding quasicrystals involves tuning locations of maxima in the dispersion relation, or equivalently in the liquid state partial static structure factors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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