title: Stretched Exponential Relaxation of Glasses at Low Temperature.
abstract: The question of whether glass continues to relax at low temperature is of fundamental and practical interest. Here, we report a novel atomistic simulation method allowing us to directly access the long-term dynamics of glass relaxation at room temperature. We find that the potential energy relaxation follows a stretched exponential decay, with a stretching exponent β=3/5, as predicted by Phillips's diffusion-trap model. Interestingly, volume relaxation is also found. However, it is not correlated to the energy relaxation, but it is rather a manifestation of the mixed alkali effect.
authors.affiliation: Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA.
authors.forename: Yingtian
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA.
authors.forename: Mengyi
authors.initials: M
authors.lastname: Wang
authors.affiliation: Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA.
authors.forename: Dawei
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA.
authors.forename: Bu
authors.initials: B
authors.lastname: Wang
authors.affiliation: Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA.|California Nanosystems Institute (CNSI), University of California, Los Angeles, California 90095, USA.
authors.forename: Gaurav
authors.initials: G
authors.lastname: Sant
authors.affiliation: Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Bauchy