Fluctuating phases and fluctuating relaxation times in glass forming liquids
Abstract
The presence of fluctuating local relaxation times, has been used for some time as a conceptual tool to describe dynamical heterogeneities in glass-forming systems. However, until now no general method is known to extract the full space and time dependent τ$$^→_r$$(t) from experimental or numerical data. Here we report on a new method for determining a local phase field, from snapshots of the positions of the particles in a system, and we apply it to extract and from numerical simulations. By studying how this phase field depends on the number of snapshots, we find that it is a well defined quantity. By studying fluctuations of the phase field, we find that they describe heterogeneities well at long distance scales.
- Authors:
-
- Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.; Univ. of Eswatini, Kwaluseni (Eswatini)
- Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.; Northwestern Univ., Evanston, IL (United States)
- Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.
- Publication Date:
- Research Org.:
- Ohio Univ., Athens, OH (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1609730
- Grant/Contract Number:
- FG02-06ER46300; PHY99-07949; PHY05-51164
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Science & Technology - Other Topics; Materials Science; Physics
Citation Formats
Mavimbela, Gcina A., Parsaeian, Azita, and Castillo, Horacio E.. Fluctuating phases and fluctuating relaxation times in glass forming liquids. United States: N. p., 2019.
Web. doi:10.1063/1.5065574.
Mavimbela, Gcina A., Parsaeian, Azita, & Castillo, Horacio E.. Fluctuating phases and fluctuating relaxation times in glass forming liquids. United States. https://doi.org/10.1063/1.5065574
Mavimbela, Gcina A., Parsaeian, Azita, and Castillo, Horacio E.. Mon .
"Fluctuating phases and fluctuating relaxation times in glass forming liquids". United States. https://doi.org/10.1063/1.5065574. https://www.osti.gov/servlets/purl/1609730.
@article{osti_1609730,
title = {Fluctuating phases and fluctuating relaxation times in glass forming liquids},
author = {Mavimbela, Gcina A. and Parsaeian, Azita and Castillo, Horacio E.},
abstractNote = {The presence of fluctuating local relaxation times, τr→(t) has been used for some time as a conceptual tool to describe dynamical heterogeneities in glass-forming systems. However, until now no general method is known to extract the full space and time dependent τ$^→_r$(t) from experimental or numerical data. Here we report on a new method for determining a local phase field, Φr→(t)≡∫tdt'τr→(t') from snapshots {r→(ti)}i=1…M of the positions of the particles in a system, and we apply it to extract Φr→(t) and τr→(t) from numerical simulations. By studying how this phase field depends on the number of snapshots, we find that it is a well defined quantity. By studying fluctuations of the phase field, we find that they describe heterogeneities well at long distance scales.},
doi = {10.1063/1.5065574},
journal = {AIP Advances},
number = 1,
volume = 9,
place = {United States},
year = {Mon Jan 14 00:00:00 EST 2019},
month = {Mon Jan 14 00:00:00 EST 2019}
}
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Works referencing / citing this record:
Fluctuations in the time variable and dynamical heterogeneity in glass-forming systems
journal, October 2013
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- Physical Review E, Vol. 88, Issue 4