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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2602.07417 |
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| _version_ | 1866917267984351232 |
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| author | Mori, Tatsuya Mizuno, Hideyuki Motokawa, Yuzuki Kyotani, Dan Oh, Soo Han Fujii, Yasuhiro Koreeda, Akitoshi Kohara, Shinji Kojima, Seiji |
| author_facet | Mori, Tatsuya Mizuno, Hideyuki Motokawa, Yuzuki Kyotani, Dan Oh, Soo Han Fujii, Yasuhiro Koreeda, Akitoshi Kohara, Shinji Kojima, Seiji |
| contents | Boson peak dynamics in glasses produce a robust crossover in the terahertz (THz) dielectric response that standard Debye or Lorentz models do not capture. We develop a continuum description of this THz response, coupling an infrared-effective charge fluctuation spectrum to a frequency-dependent shear modulus, and apply it to glycerol glass. The model reproduces the measured complex dielectric function and the nearly linear infrared light-vibration coupling around the boson peak, and highlights the dominant role of transverse shear dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_07417 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Continuum model for the terahertz dielectric response of glasses Mori, Tatsuya Mizuno, Hideyuki Motokawa, Yuzuki Kyotani, Dan Oh, Soo Han Fujii, Yasuhiro Koreeda, Akitoshi Kohara, Shinji Kojima, Seiji Disordered Systems and Neural Networks Boson peak dynamics in glasses produce a robust crossover in the terahertz (THz) dielectric response that standard Debye or Lorentz models do not capture. We develop a continuum description of this THz response, coupling an infrared-effective charge fluctuation spectrum to a frequency-dependent shear modulus, and apply it to glycerol glass. The model reproduces the measured complex dielectric function and the nearly linear infrared light-vibration coupling around the boson peak, and highlights the dominant role of transverse shear dynamics. |
| title | Continuum model for the terahertz dielectric response of glasses |
| topic | Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2602.07417 |