Inducing ferroelectricity in NH$_4$I and NH$_4$Br via partial replacement of protons by deuterons
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914809954435072 |
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| author | Zhao, Miao Miao Meng, Lei Xu, Yi Yang Du, Na Yen, Fei |
| author_facet | Zhao, Miao Miao Meng, Lei Xu, Yi Yang Du, Na Yen, Fei |
| contents | While all of the polymorphs of NH$_4$I and NH$_4$Br are non-polar, a reversible electric polarization is established in the ordered $γ$ phases of (NH$_4$)$_{0.73}$(ND$_4$)$_{0.27}$I and (NH$_4$)$_{0.84}$(ND$_4$)$_{0.16}$Br (where D is $^2$H) via $dc$ electric fields. The presence of two groups of orbital magnetic moments appears to be responsible for the asymmetric lattice distortions. Our findings provide an alternative pathway for hydrogen-based materials to potentially add a ferroelectric functionality. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_15277 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Inducing ferroelectricity in NH$_4$I and NH$_4$Br via partial replacement of protons by deuterons Zhao, Miao Miao Meng, Lei Xu, Yi Yang Du, Na Yen, Fei Materials Science While all of the polymorphs of NH$_4$I and NH$_4$Br are non-polar, a reversible electric polarization is established in the ordered $γ$ phases of (NH$_4$)$_{0.73}$(ND$_4$)$_{0.27}$I and (NH$_4$)$_{0.84}$(ND$_4$)$_{0.16}$Br (where D is $^2$H) via $dc$ electric fields. The presence of two groups of orbital magnetic moments appears to be responsible for the asymmetric lattice distortions. Our findings provide an alternative pathway for hydrogen-based materials to potentially add a ferroelectric functionality. |
| title | Inducing ferroelectricity in NH$_4$I and NH$_4$Br via partial replacement of protons by deuterons |
| topic | Materials Science |
| url | https://arxiv.org/abs/2405.15277 |