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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/1912.12821 |
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| _version_ | 1866915429113397248 |
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| author | Xu, Wentao Wang, Lihua Lee, Yeongjun Yang, D. ChangMo Hajibabaei, Amir Park, Cheolmin Lee, Tae-Woo Kim, Kwang S. |
| author_facet | Xu, Wentao Wang, Lihua Lee, Yeongjun Yang, D. ChangMo Hajibabaei, Amir Park, Cheolmin Lee, Tae-Woo Kim, Kwang S. |
| contents | We report the prediction and observation of supra-binary ferroelectricity in a ferroelectric nanowire (FNW) covered with a semi-cylindrical gate that provides an anisotropic electric field in the FNW. There are gate-voltage-driven transitions between four polarization phases in FNW's cross section, dubbed axial-up, axial-down, radial-in and radial-out. They are determined by the interplay between the topological depolarization energy and the free energy induced by an anisotropic external electric field, in clear distinction from the conventional film-based binary ferroelectricity. When the FNW is mounted on a biased graphene nanoribbon (GNR), these transitions induce exotic current-voltage hysteresis in the FNW-GNR transistor. Our discovery suggests new operating mechanisms of ferroelectric devices. In particular, it enables intrinsic multi-bit information manipulation in parallel to the binary manipulation employed in data storage devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1912_12821 |
| institution | arXiv |
| publishDate | 2019 |
| record_format | arxiv |
| spellingShingle | Supra-Binary Ferroelectricity in a Nanowire Xu, Wentao Wang, Lihua Lee, Yeongjun Yang, D. ChangMo Hajibabaei, Amir Park, Cheolmin Lee, Tae-Woo Kim, Kwang S. Materials Science Other Condensed Matter We report the prediction and observation of supra-binary ferroelectricity in a ferroelectric nanowire (FNW) covered with a semi-cylindrical gate that provides an anisotropic electric field in the FNW. There are gate-voltage-driven transitions between four polarization phases in FNW's cross section, dubbed axial-up, axial-down, radial-in and radial-out. They are determined by the interplay between the topological depolarization energy and the free energy induced by an anisotropic external electric field, in clear distinction from the conventional film-based binary ferroelectricity. When the FNW is mounted on a biased graphene nanoribbon (GNR), these transitions induce exotic current-voltage hysteresis in the FNW-GNR transistor. Our discovery suggests new operating mechanisms of ferroelectric devices. In particular, it enables intrinsic multi-bit information manipulation in parallel to the binary manipulation employed in data storage devices. |
| title | Supra-Binary Ferroelectricity in a Nanowire |
| topic | Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/1912.12821 |