The shear modulus of metastable amorphous solids with strong central and bond-bending interactions

相场晶体模型本体非晶相中的热力学、形成动力学与结构关联

Thermodynamics, formation dynamics and structural correlations in the bulk amorphous phase of the phase-field crystal model

本文利用PFC模型模拟非晶固体，揭示其自由能的历史依赖性、液体—非晶一级转变及噪声诱导的多步成核路径。

Scaling Theory for Wöhler plots in amorphous solids under cyclic forcing

In mechanical engineering Wöhler plots serve to measure the average number of load cycles before materials break, as a function of the maximal stress in each cycle. Although such plots are prevalent in engineering for more than 150 years, their theoretical understanding is lacking. Recently a scaling theory of Wöhler plots in the context of cyclic bending was offered [1]. Here we elaborate further on cyclic bending and extend the considerations to cyclic tensile loads on an amorphous strip of material; the scaling theory applies to both types of cyclic loading equally well. On the basis of ato…

Fatigue and Collapse of Cyclically Bent Strip of Amorphous Solid

Fatigue caused by cyclic bending of a piece of material, resulting in its mechanical failure, is a phenomenon that had been studied for ages by engineers and physicists alike. In this Letter we study such fatigue in a strip of athermal amorphous solid. On the basis of atomistic simulations we conclude that the crucial quantity to focus on is the {\em accumulated damage}. Although this quantity exhibits large sample-to-sample fluctuations, its dependence on the loading determines the statistics of the number of cycles to failure. Thus we can provide a scaling theory for the Wöhler plots of mean…

振动强耦合下非晶态非导电聚合物的超常电导率

Extraordinary electrical conductance through amorphous non-conducting polymers under vibrational strong coupling

针对非晶态非掺杂聚合物难导电的问题，研究通过将三类聚合物的芳香族C-H(D)面外弯曲模式与微腔真空电磁场振动强耦合，实现电导率至少提升六个数量级，揭示了量子光增强非晶聚合物长程相干输运的作用。

Understanding the scaling of boson peak through insensitivity of elastic heterogeneity to bending rigidity in polymer glasses

Amorphous materials exhibit peculiar mechanical and vibrational properties, including non-affine elastic responses and excess vibrational states, i.e., the so-called boson peak. For polymer glasses, these properties are considered to be affected by the bending rigidity of the constituent polymer chains. In our recent work [Tomoshige, et al., Sci. Rep. 9 19514 (2019)], we have revealed simple relationships between the variations of vibrational properties and the global elastic properties: the response of the boson peak scales only with that of the global shear modulus. This observation suggests…

Manifestations of metastable criticality in the long-range structure of model water glasses

Much attention has been devoted to water's metastable phase behavior, including polyamorphism (multiple amorphous solid phases), and the hypothesized liquid-liquid transition and associated critical point. However, the possible relationship between these phenomena remains incompletely understood. Using molecular dynamics simulations of the realistic TIP4P/2005 model, we found a striking signature of the liquid-liquid critical point in the structure of water glasses, manifested as a pronounced increase in long-range density fluctuations at pressures proximate to the critical pressure. By contra…