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Systematics of group-nonsubgroup transitions: Square to triangle transition - art. no. 060104

机译:组-非子组过渡的系统学:正方形到三角形的过渡-艺术。没有。 060104

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摘要

A variety of structural transitions in nature do not involve a group-subgroup relationship. A two-dimensional example is the transition between a square lattice and a triangular lattice, which is known to occur in vortex lattices, Wigner crystals, skyrmion lattices, colloids, diblock copolymers, etc. A three-dimensional analog is the shock-induced BCC to HCP transition in iron. We develop a systematic technique that incorporates site symmetry and yields displacive transition mechanisms and free energy forms for such structural changes. This procedure is demonstrated for the square to triangle transition. [References: 16]
机译:自然界中的各种结构性转变都不涉及群体-亚群关系。二维示例是正方形晶格和三角形晶格之间的过渡,已知该过渡出现在涡旋晶格,维格纳晶体,Skyrmion晶格,胶体,二嵌段共聚物等中。三维模拟是冲击诱发的BCC向铁中的HCP过渡。我们开发了一种系统的技术,该技术结合了站点对称性,并产生了结构转变的位移过渡机制和自由能形式。演示了从正方形到三角形过渡的此过程。 [参考:16]

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