Long-wavelength fluctuations and dimensionality crossover in confined liquids
The phase behavior of liquids confined in a slit geometry does not reveal a crossover from a three- to a two-dimensional behavior as the gap size decreases. Indeed, the prototypical two-dimensional hexatic phase only occurs in liquids confined to a monolayer. Here, we demonstrate that the dimensiona...
Saved in:
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/159297 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-159297 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-1592972023-02-28T20:05:28Z Long-wavelength fluctuations and dimensionality crossover in confined liquids Yang, Jing Li, Yan-Wei Ciamarra, Massimo Pica School of Physical and Mathematical Sciences Science::Physics Confined Liquids Phonons The phase behavior of liquids confined in a slit geometry does not reveal a crossover from a three- to a two-dimensional behavior as the gap size decreases. Indeed, the prototypical two-dimensional hexatic phase only occurs in liquids confined to a monolayer. Here, we demonstrate that the dimensionality crossover is apparent in the lateral size dependence of the relaxation dynamics of confined liquids, developing a Debye model for the density of vibrational states of confined systems and performing extensive numerical simulations. In confined systems, Mermin-Wagner fluctuations enhance the amplitude of vibrational motion - or the Debye-Waller factor - by a quantity scaling as the inverse gap width and proportional to the logarithm of the aspect ratio, as a clear signature of a two-dimensional behavior. As the temperature or lateral system size increases, the crossover to a size-independent relaxation dynamics occurs when structural relaxation takes place before the vibrational modes with the longest wavelength develop. Ministry of Education (MOE) Published version We acknowledge support from the Singapore Ministry of Education through the Academic Research Fund Tier 1 RG 86/19(S), Singapore, and the National Supercomputing Centre Singapore (NSCC) for the computational resources. 2022-06-10T08:25:02Z 2022-06-10T08:25:02Z 2021 Journal Article Yang, J., Li, Y. & Ciamarra, M. P. (2021). Long-wavelength fluctuations and dimensionality crossover in confined liquids. Physical Review Research, 3(3), 033172-. https://dx.doi.org/10.1103/PhysRevResearch.3.033172 2643-1564 https://hdl.handle.net/10356/159297 10.1103/PhysRevResearch.3.033172 2-s2.0-85115889668 3 3 033172 en RG 86/19(S) Physical Review Research © 2021 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
Science::Physics Confined Liquids Phonons |
spellingShingle |
Science::Physics Confined Liquids Phonons Yang, Jing Li, Yan-Wei Ciamarra, Massimo Pica Long-wavelength fluctuations and dimensionality crossover in confined liquids |
description |
The phase behavior of liquids confined in a slit geometry does not reveal a crossover from a three- to a two-dimensional behavior as the gap size decreases. Indeed, the prototypical two-dimensional hexatic phase only occurs in liquids confined to a monolayer. Here, we demonstrate that the dimensionality crossover is apparent in the lateral size dependence of the relaxation dynamics of confined liquids, developing a Debye model for the density of vibrational states of confined systems and performing extensive numerical simulations. In confined systems, Mermin-Wagner fluctuations enhance the amplitude of vibrational motion - or the Debye-Waller factor - by a quantity scaling as the inverse gap width and proportional to the logarithm of the aspect ratio, as a clear signature of a two-dimensional behavior. As the temperature or lateral system size increases, the crossover to a size-independent relaxation dynamics occurs when structural relaxation takes place before the vibrational modes with the longest wavelength develop. |
author2 |
School of Physical and Mathematical Sciences |
author_facet |
School of Physical and Mathematical Sciences Yang, Jing Li, Yan-Wei Ciamarra, Massimo Pica |
format |
Article |
author |
Yang, Jing Li, Yan-Wei Ciamarra, Massimo Pica |
author_sort |
Yang, Jing |
title |
Long-wavelength fluctuations and dimensionality crossover in confined liquids |
title_short |
Long-wavelength fluctuations and dimensionality crossover in confined liquids |
title_full |
Long-wavelength fluctuations and dimensionality crossover in confined liquids |
title_fullStr |
Long-wavelength fluctuations and dimensionality crossover in confined liquids |
title_full_unstemmed |
Long-wavelength fluctuations and dimensionality crossover in confined liquids |
title_sort |
long-wavelength fluctuations and dimensionality crossover in confined liquids |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/159297 |
_version_ |
1759854795498192896 |