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Title: | Ferroelectric freestanding hafnia membranes with metastable rhombohedral structure down to 1-nm-thick |
Authors: | Shen, Yufan Ooe, Kousuke Yuan, Xueyou Yamada, Tomoaki Kobayashi, Shunsuke Haruta, Mitsutaka https://orcid.org/0000-0002-2237-7242 (unconfirmed) Kan, Daisuke https://orcid.org/0000-0002-7505-0059 (unconfirmed) Shimakawa, Yuichi https://orcid.org/0000-0003-1019-2512 (unconfirmed) |
Author's alias: | 大江, 耕介 山田, 智明 小林, 俊介 治田, 充貴 菅, 大介 島川, 祐一 |
Keywords: | Ferroelectrics and multiferroics Solid-state chemistry Two-dimensional materials |
Issue Date: | 25-Jun-2024 |
Publisher: | Springer Nature |
Journal title: | Nature Communications |
Volume: | 15 |
Thesis number: | 4789 |
Abstract: | Two-dimensional freestanding membranes of materials, which can be transferred onto and make interfaces with any material, have attracted attention in the search for functional properties that can be utilized for next-generation nanoscale devices. We fabricated stable 1-nm-thick hafnia membranes exhibiting the metastable rhombohedral structure and out-of-plane ferroelectric polarizations as large as 13 μC/㎝². We also found that the rhombohedral phase transforms into another metastable orthorhombic phase without the ferroelectricity deteriorating as the thickness increases. Our results reveal the key role of the rhombohedral phase in the scale-free ferroelectricity in hafnia and also provide critical insights into the formation mechanism and phase stability of the metastable hafnia. Moreover, ultrathin hafnia membranes enable heterointerfaces and devices to be fabricated from structurally dissimilar materials beyond structural constrictions in conventional film-growth techniques. |
Description: | 二次元強誘電体の作製に成功 --強誘電体デバイス開発の新しいルートを開拓--.京都大学プレスリリース. 2024-06-26. |
Rights: | © The Author(s) 2024 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
URI: | http://hdl.handle.net/2433/289502 |
DOI(Published Version): | 10.1038/s41467-024-49055-w |
PubMed ID: | 38918364 |
Related Link: | https://www.kyoto-u.ac.jp/ja/research-news/2024-06-26-0 |
Appears in Collections: | Journal Articles |
This item is licensed under a Creative Commons License