玻璃振动变形模型的记忆效应
Memory Effects in Schematic Models of Glasses Subjected to Oscillatory Deformation
摘要：
我们考虑两个示意图模型的玻璃受到振荡剪切变形，动机的观察，在计算机模拟的模型玻璃，从本地化的非平衡过渡到扩散制度的剪切振幅的增加，和持久的记忆效应在本地化制度。这些示意性模型中的第一个是NK模型，这是一种先前作为剪切非晶态固体模型研究的具有无序多自旋相互作用的自旋模型。第二个模型，一个过渡矩阵模型，是一个抽象的方式，其中占据局部能量极小值的振荡变形周期下的演变制定。在这两个模型中，我们发现了类似于先前研究的原子模型玻璃的行为。我们讨论可能的进一步扩展的方法概述。
英文摘要：
We consider two schematic models of glasses subjected to oscillatory shear deformation, motivated by the observations, in computer simulations of a model glass, of a nonequilibrium transition from a localized to a diffusive regime as the shear amplitude is increased, and of persistent memory effects in the localized regime. The first of these schematic models is the NK model, a spin model with disordered multi-spin interactions previously studied as a model for sheared amorphous solids. The second model, a transition matrix model, is an abstract formulation of the manner in which occupancy of local energy minima evolves under oscillatory deformation cycles. In both of these models, we find a behavior similar to that of an atomic model glass studied earlier. We discuss possible further extensions of the approaches outlined.
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