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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| s43246-023-00381-4.pdf | 1.23 MB | Adobe PDF | 見る/開く |
| タイトル: | Gapless fermionic excitation in the antiferromagnetic state of ytterbium zigzag chain |
| 著者: | Hori, Fumiya Kinjo, Katsuki Kitagawa, Shunsaku    https://orcid.org/0000-0002-1855-4760 (unconfirmed)Ishida, Kenji Mizutani, Souichiro Yamamoto, Rikako Ohmagari, Yudai Onimaru, Takahiro |
| 著者名の別形: | 堀, 文哉 金城, 克樹 北川, 俊作 石田, 憲二 水谷, 宗一郎 山本, 理香子 大曲, 雄大 鬼丸, 孝博 |
| キーワード: | Electronic properties and materials Magnetic properties and materials |
| 発行日: | 21-Jul-2023 |
| 出版者: | Springer Nature |
| 誌名: | Communications Materials |
| 巻: | 4 |
| 論文番号: | 55 |
| 抄録: | The emergence of charge-neutral fermionic excitations in magnetic systems is one of the unresolved issues in recent condensed matter physics. This type of excitations has been observed in various systems, such as low-dimensional quantum spin liquids, Kondo insulators, and antiferromagnetic insulators. Here, we report the presence of a pronounced gapless spin excitation in the low-temperature antiferromagnetic state of YbCuS₂ semiconductor, where trivalent ytterbium atoms form a zigzag chain structure. We confirm the presence of this gapless excitations by a combination of experimental probes, namely ⁶³/⁶⁵Cu-nuclear magnetic resonance and nuclear quadrupole resonance, as well as specific heat measurements, revealing a linear low-temperature behavior of both the nuclear spin-lattice relaxation rate 1/T₁ and the specific heat. This system provides a platform to investigate the origin of gapless excitations in spin chains and the relationship between emergent fermionic excitations and frustration. |
| 記述: | ジグザグ鎖構造をもつ磁性体で現れる電気的中性な準粒子の発見. 京都大学プレスリリース. 2023-07-28. |
| 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/2433/284488 |
| DOI(出版社版): | 10.1038/s43246-023-00381-4 |
| 関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2023-07-28-0 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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