Inelastic electron scattering at large angles: the phonon polariton contribution
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arXiv
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| Hauptverfasser: | , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910292805419008 |
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| author | Yang, Hongbin Zeiger, Paul Konečná, Andrea Han, Lu Miao, Guangyao Zhou, Yinong Huang, Yifeng Yan, Xingxu Wang, Weihua Guo, Jiandong Nie, Yuefeng Wu, Ruqian Rusz, Jan Pan, Xiaoqing |
| author_facet | Yang, Hongbin Zeiger, Paul Konečná, Andrea Han, Lu Miao, Guangyao Zhou, Yinong Huang, Yifeng Yan, Xingxu Wang, Weihua Guo, Jiandong Nie, Yuefeng Wu, Ruqian Rusz, Jan Pan, Xiaoqing |
| contents | We explore the inelastic electron scattering in SrTiO3, PbTiO3, and SiC in their phonon energy range, challenging the assumption that phonon polaritons are excluded at large angles in high-resolution transmission electron energy-loss spectroscopy. We demonstrate that through multiple scattering, the electron beam can excite both phonons and phonon polaritons, and the relative proportion of each varies depending on the structure factor and scattering angle. Integrating dielectric theory, density functional theory, and multi-slice simulations, we provide a comprehensive framework for understanding these interactions in materials with polar optical phonons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_04719 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Inelastic electron scattering at large angles: the phonon polariton contribution Yang, Hongbin Zeiger, Paul Konečná, Andrea Han, Lu Miao, Guangyao Zhou, Yinong Huang, Yifeng Yan, Xingxu Wang, Weihua Guo, Jiandong Nie, Yuefeng Wu, Ruqian Rusz, Jan Pan, Xiaoqing Materials Science We explore the inelastic electron scattering in SrTiO3, PbTiO3, and SiC in their phonon energy range, challenging the assumption that phonon polaritons are excluded at large angles in high-resolution transmission electron energy-loss spectroscopy. We demonstrate that through multiple scattering, the electron beam can excite both phonons and phonon polaritons, and the relative proportion of each varies depending on the structure factor and scattering angle. Integrating dielectric theory, density functional theory, and multi-slice simulations, we provide a comprehensive framework for understanding these interactions in materials with polar optical phonons. |
| title | Inelastic electron scattering at large angles: the phonon polariton contribution |
| topic | Materials Science |
| url | https://arxiv.org/abs/2401.04719 |