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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.06243 |
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| _version_ | 1866914790360743936 |
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| author | Yu, H. Fukada, Y. Nishida, G. Takubo, K. Ishikawa, T. Koshihara, S. Ikeda, N. Okimoto, Y. |
| author_facet | Yu, H. Fukada, Y. Nishida, G. Takubo, K. Ishikawa, T. Koshihara, S. Ikeda, N. Okimoto, Y. |
| contents | Femtosecond time-resolved second harmonic generation (SHG) measurements were performed at room temperature on a single crystal of LuFe2O4, which has recently attracted attention as an electronic ferroelectric material in which polarization occurs due to the real-space arrangement of Fe2+ and Fe3+. We irradiated the crystal with 800 nm laser pulses, traced the subsequent SHG changes, and observed anisotropic polarization dynamics: immediately after photoexcitation, the in-plane (ab-plane) component of the SHG greatly reduced, while the inter-plane (c-axis) SHG increased. This means that a hidden photoexcited state, in which the in-plane charge ordering is broken but the polarization along c-axis direction enhanced, has been created by photoexcitation, indicating that the electronic ferroelectricity can be controlled on a femtosecond scale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_06243 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultrafast Anisotropic Polarization Dynamics of Electronic Ferroelectrics LuFe2O4 Yu, H. Fukada, Y. Nishida, G. Takubo, K. Ishikawa, T. Koshihara, S. Ikeda, N. Okimoto, Y. Materials Science Femtosecond time-resolved second harmonic generation (SHG) measurements were performed at room temperature on a single crystal of LuFe2O4, which has recently attracted attention as an electronic ferroelectric material in which polarization occurs due to the real-space arrangement of Fe2+ and Fe3+. We irradiated the crystal with 800 nm laser pulses, traced the subsequent SHG changes, and observed anisotropic polarization dynamics: immediately after photoexcitation, the in-plane (ab-plane) component of the SHG greatly reduced, while the inter-plane (c-axis) SHG increased. This means that a hidden photoexcited state, in which the in-plane charge ordering is broken but the polarization along c-axis direction enhanced, has been created by photoexcitation, indicating that the electronic ferroelectricity can be controlled on a femtosecond scale. |
| title | Ultrafast Anisotropic Polarization Dynamics of Electronic Ferroelectrics LuFe2O4 |
| topic | Materials Science |
| url | https://arxiv.org/abs/2405.06243 |