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Slow stretched-exponential and fast compressed-exponential relaxation from local event dynamics
- Publication Year :
- 2021
- Publisher :
- Apollo - University of Cambridge Repository, 2021.
-
Abstract
- We propose an atomistic model for correlated particle dynamics in liquids and glasses predicting both slow stretched-exponential relaxation (SER) and fast compressed-exponential relaxation (CER). The model is based on the key concept of elastically interacting local relaxation events. SER is related to slowing down of dynamics of local relaxation events as a result of this interaction, whereas CER is related to the avalanche-like dynamics in the low-temperature glass state. The model predicts temperature dependence of SER and CER seen experimentally and recovers the simple, Debye, exponential decay at high temperature. Finally, we reproduce SER to CER crossover across the glass transition recently observed in metallic glasses.
- Subjects :
- Paper
Physics::General Physics
liquids
Crossover
FOS: Physical sciences
02 engineering and technology
Condensed Matter - Soft Condensed Matter
01 natural sciences
glasses
symbols.namesake
relaxation
0103 physical sciences
General Materials Science
glass transition
Exponential decay
010306 general physics
Condensed Matter - Statistical Mechanics
Debye
Physics
Amorphous metal
Condensed matter physics
Statistical Mechanics (cond-mat.stat-mech)
non-equilibrium physics
Soft matter, biophysics and liquids
Disordered Systems and Neural Networks (cond-mat.dis-nn)
Condensed Matter - Disordered Systems and Neural Networks
021001 nanoscience & nanotechnology
Condensed Matter Physics
Exponential function
symbols
Relaxation (physics)
Soft Condensed Matter (cond-mat.soft)
0210 nano-technology
Glass transition
Event (particle physics)
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....466bdf455cb37bc506fabd6924e86b17
- Full Text :
- https://doi.org/10.17863/cam.71423