Ultrastable metallic glasses in silico

Front propagation versus bulk relaxation in the annealing dynamics of a kinetically constrained model of ultrastable glasses

Glasses prepared by physical vapour deposition have been shown to be remarkably more stable than those prepared by standard cooling protocols, with properties that appear to be similar to systems aged for extremely long times. When subjected to a rapid rise in temperature, ultrastable glasses anneal towards the liquid in a qualitatively different manner than ordinary glasses, with the seeming competition of different timescales and lengthscales. We numerically reproduce the phenomenology of ultrastable glass annealing with a kinetically constrained model, a three dimensional East model with so…

Density controls the kinetic stability of ultrastable glasses

We use a swap Monte Carlo algorithm to numerically prepare bulk glasses with kinetic stability comparable to that of glass films produced experimentally by physical vapor deposition. By melting these systems into the liquid state, we show that some of our glasses retain their amorphous structures longer than 10^5 times the equilibrium structural relaxation time. This exceptional kinetic stability cannot be achieved experimentally for bulk materials. We perform simulations at both constant volume and constant pressure to demonstrate that the density mismatch between the ultrastable glass and th…

超稳定玻璃中的前沿传播具有动力学异质性

Front propagation in ultrastable glasses is dynamically heterogeneous

通过 swap Monte Carlo 模拟超稳定玻璃的异质转变，揭示其平衡化前沿继承体相液体的动力学异质性，在空间上异质、时间上间歇地传播，并将平均前沿速度与液体平衡扩散系数关联，为实验测量过冷液体动力学异质性特征长度提供新途径。

活性粒子掺杂抑制超稳定玻璃的脆性失效

Active Particle Doping Suppresses Brittle Failure in Ultrastable Glasses

研究通过模拟掺杂自驱动粒子的超稳定玻璃，发现活性力能将脆性剪切带失效转变为连续延迟的均匀屈服，且活性力与剪切速率存在补偿关系，屈服应力与持续时间呈非单调关系。

活性超稳定玻璃中的逆包辛格效应

Inverse Bauschinger Effect in Active Ultrastable Glasses

本文研究 run-and-tumble 活性与全局剪切共同作用下超稳定玻璃的记忆效应，揭示剪切带网络导致的常规与逆包辛格效应及循环软化结构演化。

面向超稳定玻璃的计算方法

Computational Methods toward Ultrastable Glasses

本综述概述了实现超稳定玻璃的关键计算算法，分析各方法的效率、局限与稳定性，助力研究者理解该领域现状与机遇。

The melting of stable glasses is governed by nucleation-and-growth dynamics

We discuss the microscopic mechanisms by which low-temperature amorphous states, such as ultrastable glasses, transform into equilibrium fluids, after a sudden temperature increase. Experiments suggest that this process is similar to the melting of crystals, thus differing from the behaviour found in ordinary glasses. We rationalize these observations using the physical idea that the transformation process takes place very close to a `hidden' equilibrium first-order phase transition, which is observed in systems of coupled replicas. We illustrate our views using simulation results for a simple…

Magnetic Glass formed by kinetic arrest of first order phase transitions

Metallic glasses are formed by splat-cooling; this ensures that atomic motions are arrested before the latent heat of solidification can be extracted. Glass is defined as a higher disorder metastable state with arrested kinetics. Arrested kinetics is a defining property of a glass, rather than structural disorder as, e.g., in amorphous silicon [1]. `Magnetic glasses' identified recently possess structural as well as magnetic long-range order, but show relaxation and specific heat as for a structural glass [1]. The values of Tc and Tg in these materials are easily varied by varying the magnetic…