| Sound attenuation at terahertz frequencies and the boson peak of vitreous silica. | |
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MedLine Citation:
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PMID: 20866974 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The propagation and damping of the acoustic excitations in vitreous silica is measured at terahertz frequencies using inelastic x-ray scattering. The apparent sound velocity shows a marked dispersion with frequency while the sound attenuation undergoes a crossover from a fourth to a second power law frequency dependence. This finding solves a recent controversy concerning the location of this crossover in vitreous silica, clarifying that it occurs at the position of the glass-characteristic excess of vibrational modes known as boson peak, and thus establishing a direct connection between boson peak and acoustic dispersion curves. |
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Authors:
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G Baldi; V M Giordano; G Monaco; B Ruta |
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Publication Detail:
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Type: Journal Article Date: 2010-05-11 |
Journal Detail:
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Title: Physical review letters Volume: 104 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-09-27 Completed Date: 2011-01-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 195501 Citation Subset: - |
Affiliation:
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European Synchrotron Radiation Facility, BP220, 38043 Grenoble, France. giacomo.baldi@esrf.fr |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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