Sound attenuation and anharmonic damping in solids with correlated disorder
We study via self-consistent Born approximation a model for sound waves in a disordered environment, in which the local fluctuations of the shear modulus G are spatially correlated with a certain correlation length ξ. The theory predicts an enhancement of the density of states over Debye's ω2 l...
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| Veröffentlicht in: | Condensed Matter Physics |
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| Datum: | 2010 |
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | Englisch |
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Інститут фізики конденсованих систем НАН України
2010
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/32096 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Sound attenuation and anharmonic damping in solids with correlated disorder / W. Schirmacher, C. Tomaras, B. Schmid, G. Baldi, G. Viliani, G. Ruocco, T. Scopigno // Condensed Matter Physics. — 2010. — Т. 13, № 2. — С. 23606: 1-6. — Бібліогр.: 21 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862727188174864384 |
|---|---|
| author | Schirmacher, W. Tomaras, C. Schmid, B. Baldi, G. Viliani, G. Ruocco, G. Scopigno, T. |
| author_facet | Schirmacher, W. Tomaras, C. Schmid, B. Baldi, G. Viliani, G. Ruocco, G. Scopigno, T. |
| citation_txt | Sound attenuation and anharmonic damping in solids with correlated disorder / W. Schirmacher, C. Tomaras, B. Schmid, G. Baldi, G. Viliani, G. Ruocco, T. Scopigno // Condensed Matter Physics. — 2010. — Т. 13, № 2. — С. 23606: 1-6. — Бібліогр.: 21 назв. — англ. |
| collection | DSpace DC |
| container_title | Condensed Matter Physics |
| description | We study via self-consistent Born approximation a model for sound waves in a disordered environment, in which the local fluctuations of the shear modulus G are spatially correlated with a certain correlation length ξ. The theory predicts an enhancement of the density of states over Debye's ω2 law (boson peak) whose intensity increases for increasing correlation length, and whose frequency position is shifted downwards as 1/ξ. Moreover, the predicted disorder-induced sound attenuation coefficient Γ(k) obeys a universal scaling law ξ Γ(k) = f(kξ) for a given variance of G. Finally, the inclusion of the lowest-order contribution to the anharmonic sound damping into the theory allows us to reconcile apparently contradictory recent experimental data in amorphous SiO2.
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| first_indexed | 2025-12-07T19:01:46Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-32096 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1607-324X |
| language | English |
| last_indexed | 2025-12-07T19:01:46Z |
| publishDate | 2010 |
| publisher | Інститут фізики конденсованих систем НАН України |
| record_format | dspace |
| spelling | Schirmacher, W. Tomaras, C. Schmid, B. Baldi, G. Viliani, G. Ruocco, G. Scopigno, T. 2012-04-08T16:12:55Z 2012-04-08T16:12:55Z 2010 Sound attenuation and anharmonic damping in solids with correlated disorder / W. Schirmacher, C. Tomaras, B. Schmid, G. Baldi, G. Viliani, G. Ruocco, T. Scopigno // Condensed Matter Physics. — 2010. — Т. 13, № 2. — С. 23606: 1-6. — Бібліогр.: 21 назв. — англ. 1607-324X PACS: 63.50.-x, 43.20.+g, 65.60.+a https://nasplib.isofts.kiev.ua/handle/123456789/32096 We study via self-consistent Born approximation a model for sound waves in a disordered environment, in which the local fluctuations of the shear modulus G are spatially correlated with a certain correlation length ξ. The theory predicts an enhancement of the density of states over Debye's ω2 law (boson peak) whose intensity increases for increasing correlation length, and whose frequency position is shifted downwards as 1/ξ. Moreover, the predicted disorder-induced sound attenuation coefficient Γ(k) obeys a universal scaling law ξ Γ(k) = f(kξ) for a given variance of G. Finally, the inclusion of the lowest-order contribution to the anharmonic sound damping into the theory allows us to reconcile apparently contradictory recent experimental data in amorphous SiO2. en Інститут фізики конденсованих систем НАН України Condensed Matter Physics Sound attenuation and anharmonic damping in solids with correlated disorder Послаблення звуку та ангармонічне загасання у твердих тілах зі скорельованим безладом Article published earlier |
| spellingShingle | Sound attenuation and anharmonic damping in solids with correlated disorder Schirmacher, W. Tomaras, C. Schmid, B. Baldi, G. Viliani, G. Ruocco, G. Scopigno, T. |
| title | Sound attenuation and anharmonic damping in solids with correlated disorder |
| title_alt | Послаблення звуку та ангармонічне загасання у твердих тілах зі скорельованим безладом |
| title_full | Sound attenuation and anharmonic damping in solids with correlated disorder |
| title_fullStr | Sound attenuation and anharmonic damping in solids with correlated disorder |
| title_full_unstemmed | Sound attenuation and anharmonic damping in solids with correlated disorder |
| title_short | Sound attenuation and anharmonic damping in solids with correlated disorder |
| title_sort | sound attenuation and anharmonic damping in solids with correlated disorder |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/32096 |
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