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Lowest-energy structures of 13-atom binary clusters: Do icosahedral clusters exist in binary liquid alloys?

机译:13原子二元团簇的最低能量结构:二面体团簇中是否存在二十面体团簇?

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Although the existence of 13-atom icosahedral clusters in one-component close-packed undercooled liquids was predicted more than half a century ago by Frank, the existence of such icosahedral clusters is less clear in liquid alloys. We study the lowest-energy structures of 13-atom A(x)B(13-x) Lennard Jones binary clusters using the modified space-fixed genetic algorithm and the artificial Lennard-Jones potential designed by Kob and Andersen. Curiously, the lowest-energy structures are non-icosahedral for almost all compositions. The role played by the icosahedral cluster in a binary glass is questionable. (c) 2007 Elsevier B.V. All rights reserved.
机译:尽管半个多世纪前的弗兰克(Frank)预测单组分密堆积过冷液体中存在13个原子的二十面体簇,但在液态合金中此类二十面体簇的存在尚不清楚。我们使用改进的固定空间遗传算法和由Kob和Andersen设计的人工Lennard-Jones势研究了13原子A(x)B(13-x)Lennard Jones二元簇的最低能级结构。奇怪的是,几乎所有成分的最低能量结构都是非二十面体的。二十面体簇在二元玻璃中扮演的角色令人怀疑。 (c)2007 Elsevier B.V.保留所有权利。

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