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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2506.04395 |
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| _version_ | 1866913877001764864 |
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| author | Lee, Ka Yin Beutler, Elliot K. Crisolo, Tifany Q. Masiello, David J. Lagos, Maureen J. |
| author_facet | Lee, Ka Yin Beutler, Elliot K. Crisolo, Tifany Q. Masiello, David J. Lagos, Maureen J. |
| contents | Using vibrational electron energy loss spectroscopy (vib-EELS) combined with numerical modeling, we investigate the physical mechanisms governing the phonon coupling between a spherical particle sustaining multipolar surface phonon modes and an underlying thin film. Depending upon their dielectric composition, a variety of hybrid phonon modes arise in the EEL spectrum due to the interaction between polarization charges in the particle and film. Mirror charge effects and phonon mode hybridization are the active mechanisms acting on dielectric and metallic-type films, respectively. Processes beyond dipole-dipole interactions are required to describe the sphere-film coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_04395 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Substrate matters: Coupled phonon modes of a spherical particle on a substrate probed with EELS Lee, Ka Yin Beutler, Elliot K. Crisolo, Tifany Q. Masiello, David J. Lagos, Maureen J. Materials Science Using vibrational electron energy loss spectroscopy (vib-EELS) combined with numerical modeling, we investigate the physical mechanisms governing the phonon coupling between a spherical particle sustaining multipolar surface phonon modes and an underlying thin film. Depending upon their dielectric composition, a variety of hybrid phonon modes arise in the EEL spectrum due to the interaction between polarization charges in the particle and film. Mirror charge effects and phonon mode hybridization are the active mechanisms acting on dielectric and metallic-type films, respectively. Processes beyond dipole-dipole interactions are required to describe the sphere-film coupling. |
| title | Substrate matters: Coupled phonon modes of a spherical particle on a substrate probed with EELS |
| topic | Materials Science |
| url | https://arxiv.org/abs/2506.04395 |