Deformation potential driven photostriction in layered ferroelectrics
Fuente:
arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866915788156305408 |
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| author | Puri, S. Rodriguez, R. Dansou, C. Bouric, L. Sheibani, A. Paillard, C. Bellaiche, L. Nakamura, H. |
| author_facet | Puri, S. Rodriguez, R. Dansou, C. Bouric, L. Sheibani, A. Paillard, C. Bellaiche, L. Nakamura, H. |
| contents | The coupling between electronic excitations and lattice deformation in van der Waals ferroelectrics is governed by a competition between the electron deformation potential and the inverse piezoelectric effect. While theory predicts that piezoelectric screening should drive a polar-axis contraction in monolayer group-IV monochalcogenides, we demonstrate that in multilayer SnS, the deformation potential provides the dominant contribution, driving a polar-axis expansion even within ferroelectric domains. By correlating polarization-resolved second-harmonic generation microscopy with ultrafast reflectance spectroscopy and first-principles calculations, we resolve the anisotropic lattice response and disentangle intrinsic photostrictive strain from extrinsic thin-film interference artifacts. These results establish a microscopic hierarchy of photostrictive mechanisms and position stacking-engineered SnS as a platform for ultrafast optomechanical transduction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_09275 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Deformation potential driven photostriction in layered ferroelectrics Puri, S. Rodriguez, R. Dansou, C. Bouric, L. Sheibani, A. Paillard, C. Bellaiche, L. Nakamura, H. Materials Science The coupling between electronic excitations and lattice deformation in van der Waals ferroelectrics is governed by a competition between the electron deformation potential and the inverse piezoelectric effect. While theory predicts that piezoelectric screening should drive a polar-axis contraction in monolayer group-IV monochalcogenides, we demonstrate that in multilayer SnS, the deformation potential provides the dominant contribution, driving a polar-axis expansion even within ferroelectric domains. By correlating polarization-resolved second-harmonic generation microscopy with ultrafast reflectance spectroscopy and first-principles calculations, we resolve the anisotropic lattice response and disentangle intrinsic photostrictive strain from extrinsic thin-film interference artifacts. These results establish a microscopic hierarchy of photostrictive mechanisms and position stacking-engineered SnS as a platform for ultrafast optomechanical transduction. |
| title | Deformation potential driven photostriction in layered ferroelectrics |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.09275 |