Ruffle, B.
[Author];
Ayrinhac, S.
[Author];
Courtens, E.
[Author];
Vacher, R.
[Author];
Foret, M.
[Author];
Wischnewski, A.
[Author];
Buchenau, U.
[Author]
Scaling the temperature-dependent boson peak of vitreous silica with the high-frequency bulk modulus derived from Brillouin scattering data
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Media type:
E-Article
Title:
Scaling the temperature-dependent boson peak of vitreous silica with the high-frequency bulk modulus derived from Brillouin scattering data
Contributor:
Ruffle, B.
[Author];
Ayrinhac, S.
[Author];
Courtens, E.
[Author];
Vacher, R.
[Author];
Foret, M.
[Author];
Wischnewski, A.
[Author];
Buchenau, U.
[Author]
Published:
APS, 2010
Published in:Physical review letters 104, 067402 (2010). doi:10.1103/PhysRevLett.104.067402
Footnote:
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Description:
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.