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首页> 外文会议>International Conference on Aperiodic Crystals >COMPUTER SIMULATION OP PHASE TRANSITION MECHANISMS BETWEEN INCOMMENSURATE PHASES
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COMPUTER SIMULATION OP PHASE TRANSITION MECHANISMS BETWEEN INCOMMENSURATE PHASES

机译：联络阶段之间的计算机仿真op相变机制

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A number of dielectric and ferroelectric crystals possess incommensurately modu-lated phases, which could be seen as a sequence of diseommensuration planes. The problem of studying nucleation and growth of the incommensurate modulation, and the question of elucidating the mechanism of changing the density of discommen-surations could be addressed by the computer simulation. Using simple hexagonal and orthorhombic microscopic models the nucleation of topological defects responsi-ble for creation of discommensurations, has been studied. Example of the collective nucleation mechanism in the commensurate q incommensurate phase transition driven by stripples will be discussed. It will be shown that the dislocation mecha-nism is responsible for the 3q Zql phase transition between two-dimensional 3q phases. During the phase transition from 3q two-dimensional modulated phase to lg stripe commensurate phase formation of domain-like texture has been observed. Coupling of the order parameter with spontaneous strain may lead to mechanism which uses the fcrroelastic domain walls to introduce the discommensurations at the commensurate q = 0 incommensurate phase transition.
机译：许多电介质和铁电晶体具有不计的模拟相阶段，其可以被视为一系列的不整联平面。计算机仿真可以解决研究核肉调制的成核和加重调制的生长的问题，以及阐明改变脱坠舟的密度的问题。研究了使用简单的六边形和矫正型微观模型，研究了拓扑缺陷的成件响应用于创建脱壳的响应。将讨论由镶边驱动的相应Q中的集体成核机制的示例将被讨论由镶边驱动的相变。将表明，脱位机制 - Nism负责二维3Q相之间的3Q ZQL相转变。在从3Q二维调制相到Lg条纹的相位转换期间，已经观察到畴样纹理的相称相位形成。具有自发菌株的订单参数的耦合可以导致使用FCCrocelastic畴壁的机制在相应的Q = 0中的相应相位过渡处引入壳体。

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