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タイトル: | Localised surface plasmon resonance inducing cooperative Jahn–Teller effect for crystal phase-change in a nanocrystal |
著者: | Sakamoto, Masanori Hada, Masaki Ota, Wataru Uesugi, Fumihiko Sato, Tohru |
著者名の別形: | 坂本, 雅典 羽田, 真毅 大田, 航 上杉, 文彦 佐藤, 徹 |
キーワード: | Nanoparticles Nanophotonics and plasmonics |
発行日: | 31-Jul-2023 |
出版者: | Springer Nature |
誌名: | Nature Communications |
巻: | 14 |
論文番号: | 4471 |
抄録: | The Jahn–Teller effect, a phase transition phenomenon involving the spontaneous breakdown of symmetry in molecules and crystals, causes important physical and chemical changes that affect various fields of science. In this study, we discovered that localised surface plasmon resonance (LSPR) induced the cooperative Jahn–Teller effect in covellite CuS nanocrystals (NCs), causing metastable displacive ion movements. Electron diffraction measurements under photo illumination, ultrafast time-resolved electron diffraction analyses, and theoretical calculations of semiconductive plasmonic CuS NCs showed that metastable displacive ion movements due to the LSPR-induced cooperative Jahn–Teller effect delayed the relaxation of LSPR in the microsecond region. Furthermore, the displacive ion movements caused photo-switching of the conductivity in CuS NC films at room temperature (22 °C), such as in transparent variable resistance infrared sensors. This study pushes the limits of plasmonics from tentative control of collective oscillation to metastable crystal structure manipulation. |
記述: | 結晶中の電子の集団的な運動が原子を動かすプラズモン誘起原子変位を初めて発見 --見えない光学センサーなど新技術の実現に期待--. 京都大学プレスリリース. 2023-08-01. |
著作権等: | © The Author(s) 2023 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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/2433/284499 |
DOI(出版社版): | 10.1038/s41467-023-40153-9 |
PubMed ID: | 37524703 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2023-08-01 |
出現コレクション: | 学術雑誌掲載論文等 |
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