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Title: Local Density Correlations in Liquids

Abstract

The structure and dynamics of liquids and glasses are usually discussed in terms of the short-range atomic structure and the nature of atomic bonds. However, many properties of liquids are rather similar and only weakly dependent on chemistry. Here we suggest that these properties are controlled not so much by the short-range atomic correlations but mainly by the medium-range density correlations which are similar among various liquids and supersede chemical details of the system. Taking metallic alloy liquids as examples we discuss the origin of the medium-range density correlations and argue they are only weakly dependent on the detailed nature of the atomic bond. We also discuss some consequences of the medium-range correlations on atomic transport. By extrapolating the coherence of density correlation to infinity we can define an ideal glass state which is very diverse in the local atomic structure but is characterized by long-range density correlations. This ideal state is very different from those previously proposed based on the coherence in the atomic structure.

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1602565
Alternate Identifier(s):
OSTI ID: 1606740
Grant/Contract Number:  
[AC05-00OR22725]
Resource Type:
Published Article
Journal Name:
Frontiers in Physics
Additional Journal Information:
[Journal Name: Frontiers in Physics Journal Volume: 8]; Journal ID: ISSN 2296-424X
Publisher:
Frontiers Media SA
Country of Publication:
Switzerland
Language:
English

Citation Formats

Egami, Takeshi. Local Density Correlations in Liquids. Switzerland: N. p., 2020. Web. doi:10.3389/fphy.2020.00050.
Egami, Takeshi. Local Density Correlations in Liquids. Switzerland. doi:10.3389/fphy.2020.00050.
Egami, Takeshi. Fri . "Local Density Correlations in Liquids". Switzerland. doi:10.3389/fphy.2020.00050.
@article{osti_1602565,
title = {Local Density Correlations in Liquids},
author = {Egami, Takeshi},
abstractNote = {The structure and dynamics of liquids and glasses are usually discussed in terms of the short-range atomic structure and the nature of atomic bonds. However, many properties of liquids are rather similar and only weakly dependent on chemistry. Here we suggest that these properties are controlled not so much by the short-range atomic correlations but mainly by the medium-range density correlations which are similar among various liquids and supersede chemical details of the system. Taking metallic alloy liquids as examples we discuss the origin of the medium-range density correlations and argue they are only weakly dependent on the detailed nature of the atomic bond. We also discuss some consequences of the medium-range correlations on atomic transport. By extrapolating the coherence of density correlation to infinity we can define an ideal glass state which is very diverse in the local atomic structure but is characterized by long-range density correlations. This ideal state is very different from those previously proposed based on the coherence in the atomic structure.},
doi = {10.3389/fphy.2020.00050},
journal = {Frontiers in Physics},
number = ,
volume = [8],
place = {Switzerland},
year = {2020},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.3389/fphy.2020.00050

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