This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/7244 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.104.067402 in citations.
Scaling the temperature-dependent boson peak of vitreous silica with the high-frequency bulk modulus derived from Brillouin scattering data
Scaling the temperature-dependent boson peak of vitreous silica with the high-frequency bulk modulus derived from Brillouin scattering data
The position and strength of the boson peak in silica glass vary considerably with temperature T. Such variations cannot be explained solely with changes in the Debye energy. New Brillouin-scattering measurements are presented which allow determining the T dependence of unrelaxed acoustic velocities...
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Personal Name(s): | Ruffle, B. |
---|---|
Ayrinhac, S. / Courtens, E. / Vacher, R. / Foret, M. / Wischnewski, A. / Buchenau, U. | |
Contributing Institute: |
JCNS; JCNS Streumethoden; IFF-4 Neutronenstreuung; IFF-5 |
Published in: | Physical review letters, 104 (2010) S. 067402 |
Imprint: |
College Park, Md.
APS
2010
|
Physical Description: |
067402 |
DOI: |
10.1103/PhysRevLett.104.067402 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Physical Review Letters
104 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.104.067402 in citations.
The position and strength of the boson peak in silica glass vary considerably with temperature T. Such variations cannot be explained solely with changes in the Debye energy. New Brillouin-scattering measurements are presented which allow determining the T dependence of unrelaxed acoustic velocities. Using a velocity based on the bulk modulus, scaling exponents are found which agree with the soft-potential model. The unrelaxed bulk modulus thus appears to be a good measure for the structural evolution of silica with T and to set the energy scale for the soft potentials. |