Finding well-optimized special quasirandom structures with decision diagram

Finding well-optimized special quasirandom structures with decision diagram
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用决策图寻找优化良好的特殊拟随机结构

DOI:
10.1103/physrevmaterials.5.113803
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发表时间:
2021
影响因子:
3.4
通讯作者:
Tanaka Isao
Tanaka Isao
中科院分区:
材料科学3区
文献类型:
--
作者:
Shinohara Kohei;Seko Atsuto;Horiyama Takashi;Tanaka Isao

文献摘要

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零抑制二进制决策图(ZDD)的高级数据结构使我们能够有效地枚举非等效替代结构。ZDD不仅能够以压缩的方式存储大量的结构,而且能够有效地从ZDD中提取出满足给定约束条件的结构集。在这里,我们提出了一种基于zdd的高效算法,用于穷尽搜索模拟完全随机替代结构的特殊准随机结构(SQSs)。我们证明,目前的方法只能从由许多取代结构(bbb10¹²)组成的ZDD中提取少量的sqs。因此,我们发现比文献中提出的SQSs优化得更好。一系列的质量方程应该有助于估计替代固溶体的性质。此外,本文提出的基于ZDD的算法对于将ZDD应用于其他结构枚举问题也有一定的参考价值。
The advanced data structure of the zero-suppressed binary decision diagram (ZDD) enables us to efficiently enumerate nonequivalent substitutional structures. Not only can the ZDD store a vast number of structures in a compressed manner, but also a set of structures satisfying given constraints can be extracted from the ZDD efficiently. Here, we present a ZDD-based efficient algorithm for exhaustively searching for special quasirandom structures (SQSs) that mimic the perfectly random substitutional structure. We demonstrate that the current approach can extract only a tiny number of SQSs from a ZDD composed of many substitutional structures (> 10¹²). As a result, we find SQSs that are optimized better than those proposed in the literature. A series of SQSs should be helpful for estimating the properties of substitutional solid solutions. Furthermore, the present ZDD-based algorithm should be useful for applying the ZDD to the other structure enumeration problems.
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