Anisotropic light-electron-phonon coupling and ultrafast carrier separation in ferroelectric BaTiO$_3$
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866918411151343616 |
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| author | Swain, Atal Bihari Kale, Somnath Soni, Rohit Baum, Peter |
| author_facet | Swain, Atal Bihari Kale, Somnath Soni, Rohit Baum, Peter |
| contents | Ferroelectric materials with built-in electric fields are useful for ultrafast electronics and solar cells. Using ultrafast electron diffraction, we here report that ferroelectric BaTiO$_3$ reacts to light with a polarization-sensitive electron-phonon coupling. Excited electrons relax faster into phonons and temperature when the optical electric field aligns to the ferroelectric polarization. Also, ultrafast electron electrometry visualizes the motion of photo-excited electron-hole pairs in presence of the ferroelectric field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_25521 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anisotropic light-electron-phonon coupling and ultrafast carrier separation in ferroelectric BaTiO$_3$ Swain, Atal Bihari Kale, Somnath Soni, Rohit Baum, Peter Materials Science Other Condensed Matter Ferroelectric materials with built-in electric fields are useful for ultrafast electronics and solar cells. Using ultrafast electron diffraction, we here report that ferroelectric BaTiO$_3$ reacts to light with a polarization-sensitive electron-phonon coupling. Excited electrons relax faster into phonons and temperature when the optical electric field aligns to the ferroelectric polarization. Also, ultrafast electron electrometry visualizes the motion of photo-excited electron-hole pairs in presence of the ferroelectric field. |
| title | Anisotropic light-electron-phonon coupling and ultrafast carrier separation in ferroelectric BaTiO$_3$ |
| topic | Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2603.25521 |