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Isolating long-wavelength fluctuation from structural relaxation in two-dimensional glass : cage-relative displacement

Isolating long-wavelength fluctuation from structural relaxation in two-dimensional glass : cage-relative displacement

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SHIBA, Hayato, Peter KEIM, Takeshi KAWASAKI, 2018. Isolating long-wavelength fluctuation from structural relaxation in two-dimensional glass : cage-relative displacement. In: Journal of Physics : Condensed Matter. 30(9), 094004. ISSN 0953-8984. eISSN 1361-648X. Available under: doi: 10.1088/1361-648X/aaa8b8

@article{Shiba2018-03-07Isola-41724, title={Isolating long-wavelength fluctuation from structural relaxation in two-dimensional glass : cage-relative displacement}, year={2018}, doi={10.1088/1361-648X/aaa8b8}, number={9}, volume={30}, issn={0953-8984}, journal={Journal of Physics : Condensed Matter}, author={Shiba, Hayato and Keim, Peter and Kawasaki, Takeshi}, note={Article Number: 094004} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/41724"> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/41724"/> <dc:contributor>Keim, Peter</dc:contributor> <dcterms:issued>2018-03-07</dcterms:issued> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:contributor>Shiba, Hayato</dc:contributor> <dc:creator>Keim, Peter</dc:creator> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-03-08T07:54:38Z</dcterms:available> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Kawasaki, Takeshi</dc:contributor> <dc:language>eng</dc:language> <dcterms:title>Isolating long-wavelength fluctuation from structural relaxation in two-dimensional glass : cage-relative displacement</dcterms:title> <dc:creator>Kawasaki, Takeshi</dc:creator> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:creator>Shiba, Hayato</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-03-08T07:54:38Z</dc:date> <dcterms:abstract xml:lang="eng">It has recently been revealed that long-wavelength fluctuation exists in two-dimensional (2D) glassy systems, having the same origin as that given by the Mermin-Wagner theorem for 2D crystalline solids. In this paper, we discuss how to characterise quantitatively the long-wavelength fluctuation in a molecular dynamics simulation of a lightly supercooled liquid. We employ the cage-relative mean-square displacement (MSD), defined on relative displacement to its cage, to quantitatively separate the long-wavelength fluctuation from the original MSD. For increasing system size the amplitude of acoustic long wavelength fluctuations not only increases but shifts to later times causing a crossover with structural relaxation of caging particles. We further analyse the dynamic correlation length using the cage-relative quantities. It grows as the structural relaxation becomes slower with decreasing temperature, uncovering an overestimation by the four-point correlation function due to the long-wavelength fluctuation. These findings motivate the usage of cage-relative MSD as a starting point for analysis of 2D glassy dynamics.</dcterms:abstract> </rdf:Description> </rdf:RDF>

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