Crystalline ground states of an entropically stabilized quasicrystal model

被引：14

作者：

Lee, HK ^{[1
]}

Swendsen, RH ^{[1
]}

Widom, M ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.64.224201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A binary Lennard-Jones alloy exhibits an entropically stabilized quasicrystal state in two dimensions at elevated temperatures. We consider the ground states of this model by calculating the convex hull of cohesive energy as a function of alloy composition. Only crystalline structures with rational values of the composition appear on vertices of the convex hull. In particular, at the irrational composition of the ideal quasicrystal structure, the ground state is a coexisting mixture of two nearby quasicrystal approximants.

引用

页数：4

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