Quartic scaling of sound attenuation with frequency in vitreous silica
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866912033889320960 |
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| author | Wang, P. -J. Huynh, A. Hung, T. -C. Sheu, J. -K. Lafosse, X. Lemaitre, A. Perrin, B. Rufflé, B. Vacher, R. Sun, C. -K. Foret, M. |
| author_facet | Wang, P. -J. Huynh, A. Hung, T. -C. Sheu, J. -K. Lafosse, X. Lemaitre, A. Perrin, B. Rufflé, B. Vacher, R. Sun, C. -K. Foret, M. |
| contents | Many theories predict a quartic acoustic attenuation increase at sub-THz frequencies in glassy media for the excess vibrational modes known as the boson peak anomaly. Here by introducing phase-sensitive acoustic spectroscopy techniques with a THz bandwidth, we investigate the acoustic properties of vitreous silica at 15 and 300K in the crucial but unexplored sub-THz gap region below the boson peak. Our results indicate a strong negative dispersion starting at \SI{500}{GHz} and the onset of an athermal quartic-frequency-scaling acoustic attenuation term, which emerges above all other thermal losses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_11832 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Quartic scaling of sound attenuation with frequency in vitreous silica Wang, P. -J. Huynh, A. Hung, T. -C. Sheu, J. -K. Lafosse, X. Lemaitre, A. Perrin, B. Rufflé, B. Vacher, R. Sun, C. -K. Foret, M. Mesoscale and Nanoscale Physics Many theories predict a quartic acoustic attenuation increase at sub-THz frequencies in glassy media for the excess vibrational modes known as the boson peak anomaly. Here by introducing phase-sensitive acoustic spectroscopy techniques with a THz bandwidth, we investigate the acoustic properties of vitreous silica at 15 and 300K in the crucial but unexplored sub-THz gap region below the boson peak. Our results indicate a strong negative dispersion starting at \SI{500}{GHz} and the onset of an athermal quartic-frequency-scaling acoustic attenuation term, which emerges above all other thermal losses. |
| title | Quartic scaling of sound attenuation with frequency in vitreous silica |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2310.11832 |