Extrinsic nature of the polarization in hafnia ferroelectrics
Fuente:
arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866915421607690240 |
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| author | Mukherjee, Binayak Fedorova, Natalya S. Íñiguez-González, Jorge |
| author_facet | Mukherjee, Binayak Fedorova, Natalya S. Íñiguez-González, Jorge |
| contents | Hafnia and related fluorites defy our understanding of ferroelectricity, even if we restrict ourselves to the intrinsic properties of ideal crystals. Here we focus on a critical puzzle, namely, the sign of the electric polarization. Using first-principles simulations, we show that a polar hafnia layer with a fixed atomic configuration can give rise to depolarizing fields of either positive or negative sign, depending on the environment. This implies that (the sign of) the polarization in hafnia is extrinsic in nature. We explain this result and discuss its relevance to other ferroelectric families. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_00372 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Extrinsic nature of the polarization in hafnia ferroelectrics Mukherjee, Binayak Fedorova, Natalya S. Íñiguez-González, Jorge Materials Science Hafnia and related fluorites defy our understanding of ferroelectricity, even if we restrict ourselves to the intrinsic properties of ideal crystals. Here we focus on a critical puzzle, namely, the sign of the electric polarization. Using first-principles simulations, we show that a polar hafnia layer with a fixed atomic configuration can give rise to depolarizing fields of either positive or negative sign, depending on the environment. This implies that (the sign of) the polarization in hafnia is extrinsic in nature. We explain this result and discuss its relevance to other ferroelectric families. |
| title | Extrinsic nature of the polarization in hafnia ferroelectrics |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.00372 |