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We review the phenomena of dynamical heterogeneity in glass-forming systems and its description within replica and mean-field theories of the glass transition.

无序系统与神经网络 · 物理学 2022-09-08 Giulio Biroli , Kunimasa Miyazaki , David R. Reichman

Using extensive non-equilibrium molecular dynamics simulations, we investigate a glassforming binary Lennard-Jones mixture under shear. Both supercooled liquids and glasses are considered. Our focus is on the characterization of…

软凝聚态物质 · 物理学 2020-08-26 Mehrdad Golkia , Gaurav P. Shrivastav , Pinaki Chaudhuri , Jürgen Horbach

The dynamical heterogeneity in supercooled liquids measured by a molecular dynamics simulation has been quantified on the basis of the multifractal formalism. The singularity spectrum becomes broader as the glass transition is approached.…

统计力学 · 物理学 2009-11-07 W. Sakikawa , O. Narikiyo

In this letter we study a lattice gas system that undergoes a glassy transition. When we approach the glass transition we find both a divergence of a point to set correlation length and the vanishing of the thermodynamic potential. These…

软凝聚态物质 · 物理学 2009-11-13 Giorgio Parisi

At the microscopic level, equilibrium liquid's translational symmetry is spontaneously broken at the so-called dynamic glass transition predicted by the mean-field replica approach. We show that this fact implies the emergence of Goldstone…

统计力学 · 物理学 2015-05-28 Grzegorz Szamel , Elijah Flenner

While deeply supercooled liquids exhibit divergent viscosity and increasingly heterogeneous dynamics as the temperature drops, their structure shows only seemingly marginal changes. Understanding the nature of relaxation processes in this…

材料科学 · 物理学 2022-11-03 Matthias Lerbinger , Armand Barbot , Damien Vandembroucq , Sylvain Patinet

Molecular dynamics computer simulations of a binary Lennard-Jones glass under shear are presented. The mechanical response of glassy states having different thermal histories is investigated by imposing a wide range of external shear rates,…

软凝聚态物质 · 物理学 2016-12-14 Gaurav Prakash Shrivastav , Pinaki Chaudhuri , Jürgen Horbach

We investigate the calorimetric liquid-glass transition by performing simulations of a binary Lennard-Jones mixture in one through four dimensions. Starting at a high temperature, the systems are cooled to T=0 and heated back to the ergodic…

无序系统与神经网络 · 物理学 2009-01-01 Ralf Brüning , Denis A. St-Onge , Steve Patterson , Walter Kob

Thermodynamics and kinetics are thought to be linked in glass transitions. The quantitative predictions of -relaxation activation barriers provided by the theory of glasses based on random first order transitions are compared with…

软凝聚态物质 · 物理学 2007-05-23 Jacob D. Stevenson , Peter G. Wolynes

We analyse numerically thermal fluctuations of the static overlap between equilibrium configurations in a glass-forming liquid approaching the glass transition. We find that the emergence of slow dynamics near the onset temperature…

统计力学 · 物理学 2013-08-23 Ludovic Berthier

We compare dynamical heterogeneities in equilibrated supercooled liquids and in the nonequilibrium glassy state within the framework of the random first order transition theory. Fluctuating mobility generation and transport in the glass are…

统计力学 · 物理学 2014-01-21 Apiwat Wisitsorasak , Peter G. Wolynes

The viscosity of glass-forming liquids increases by many orders of magnitude if their temperature is lowered by a mere factor of 2-3 [1,2]. Recent studies suggest that this widespread phenomenon is accompanied by spatially heterogeneous…

无序系统与神经网络 · 物理学 2015-05-28 Walter Kob , Sandalo Roldan-Vargas , Ludovic Berthier

The growth of correlation lengths in equilibrium glass-forming liquids near the glass transition is considered a critical finding in the quest to understand the physics of glass formation. These understandings helped us understand various…

软凝聚态物质 · 物理学 2023-08-16 Anoop Mutneja , Smarajit Karmakar

Probing dynamic and static correlation in glass-forming supercooled liquids has been a challenge for decades in spite of extensive research. Dynamic correlation which manifests itself as Dynamic Heterogeneity is ubiquitous in a vast variety…

统计力学 · 物理学 2021-09-22 Anoop Mutneja , Smarajit Karmakar

Understanding glass formation is a challenge because the existence of a true glass state, distinct from liquid and solid, remains elusive: Glasses are liquids that have become too viscous to flow. An old idea, as yet unproven…

We study the glass transition by exploring a broad class of kinetic rules that can significantly modify the normal dynamics of super-cooled liquids, while maintaining thermal equilibrium. Beyond the usual dynamics of liquids, this class…

软凝聚态物质 · 物理学 2024-06-14 Cristina Gavazzoni , Carolina Brito , Matthieu Wyart

In this paper, we discuss theoretically the behavior of the four point nonlinear susceptibility and its associated correlation length for supercooled liquids close to the Mode Coupling instability temperature $T_c$. We work in the…

无序系统与神经网络 · 物理学 2009-10-31 Silvio Franz , Giorgio Parisi

Recent experiments and computer simulations show that supercooled liquids around the glass transition temperature are "dynamically heterogeneous" [1]. Such heterogeneity is expected from the random first order transition theory of the glass…

无序系统与神经网络 · 物理学 2009-10-31 Xiaoyu Xia , Peter G. Wolynes

Thermal motions in the 2D Lennard-Jones liquid near solidification are studied at equilibrium and under shear flow conditions. At the temperatures of the study, the liquid is significantly aggregated. On times of few to few tens of…

介观与纳米尺度物理 · 物理学 2017-03-03 Alexander Z. Patashinski , Rafal Orlik , Mark A. Ratner

The following properties are in the present literature associated with the behavior of super-cooled glass-forming liquids: faster than exponential growth of the relaxation time, dynamical heterogeneities, growing point-to-set correlation…

统计力学 · 物理学 2011-01-25 Florent Krzakala , Lenka Zdeborová