Type of Publication: | Journal article |
Publication status: | Published |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-0-309941 |
Author: | Klix, Christian L.; Maret, Georg; Keim, Peter |
Year of publication: | 2015 |
Published in: | Physical Review X ; 5 (2015), 4. - 041033. - eISSN 2160-3308 |
DOI (citable link): | https://dx.doi.org/10.1103/PhysRevX.5.041033 |
Summary: |
A solid - amorphous or crystalline - is defined by a finite shear modulus while a fluid lacks such. We thus experimentally investigate the elastic properties of a colloidal glass former near the glass transition: Spectroscopy of vibrational excitations yields the dispersion relations of longitudinal and transverse phonons in the glassy state. From the long-wavelength limit of the dispersion relation, we extract the bulk and the shear modulus. As expected, the latter disappear in a fluid and we measure a clearly resolved discontinuous behavior of the elastic moduli at the glass transition. This not only determines the transition temperature TG of the system but also directly addresses recent discussions about elasticity during vitrification. We show that low-frequency excitations in our system are plane waves such that continuum elasticity theory can be used to describe the macroscopic behavior.
|
Subject (DDC): | 530 Physics |
Keywords: | Condensed Matter Physics, Soft Matter, Statistical Physics |
Link to License: | Attribution 3.0 Unported |
Bibliography of Konstanz: | Yes |
KLIX, Christian L., Georg MARET, Peter KEIM, 2015. Discontinuous Shear Modulus Determines the Glass Transition Temperature. In: Physical Review X. 5(4), 041033. eISSN 2160-3308. Available under: doi: 10.1103/PhysRevX.5.041033
@article{Klix2015Disco-32474, title={Discontinuous Shear Modulus Determines the Glass Transition Temperature}, year={2015}, doi={10.1103/PhysRevX.5.041033}, number={4}, volume={5}, journal={Physical Review X}, author={Klix, Christian L. and Maret, Georg and Keim, Peter}, note={Article Number: 041033} }
<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/123456789/32474"> <dc:creator>Keim, Peter</dc:creator> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:title>Discontinuous Shear Modulus Determines the Glass Transition Temperature</dcterms:title> <dcterms:issued>2015</dcterms:issued> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/32474/3/Klix_0-309941.pdf"/> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:contributor>Klix, Christian L.</dc:contributor> <dc:creator>Klix, Christian L.</dc:creator> <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by/3.0/"/> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/32474"/> <dc:contributor>Keim, Peter</dc:contributor> <dcterms:abstract xml:lang="eng">A solid - amorphous or crystalline - is defined by a finite shear modulus while a fluid lacks such. We thus experimentally investigate the elastic properties of a colloidal glass former near the glass transition: Spectroscopy of vibrational excitations yields the dispersion relations of longitudinal and transverse phonons in the glassy state. From the long-wavelength limit of the dispersion relation, we extract the bulk and the shear modulus. As expected, the latter disappear in a fluid and we measure a clearly resolved discontinuous behavior of the elastic moduli at the glass transition. This not only determines the transition temperature TG of the system but also directly addresses recent discussions about elasticity during vitrification. We show that low-frequency excitations in our system are plane waves such that continuum elasticity theory can be used to describe the macroscopic behavior.</dcterms:abstract> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-12-18T09:30:57Z</dc:date> <dc:contributor>Maret, Georg</dc:contributor> <dc:creator>Maret, Georg</dc:creator> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:language>eng</dc:language> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/32474/3/Klix_0-309941.pdf"/> <dc:rights>Attribution 3.0 Unported</dc:rights> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-12-18T09:30:57Z</dcterms:available> </rdf:Description> </rdf:RDF>
Klix_0-309941.pdf | 309 |