Majorana-fermion origin of the planar thermal Hall effect in the Kitaev magnet α-RuCl <sub>3</sub>
-
- 今村, 薫平
- Department of Advanced Materials Science, University of Tokyo
-
- 末次, 祥大
- Department of Physics, Kyoto University
-
- 水上, 雄太
- Department of Advanced Materials Science, University of Tokyo; Department of Physics, Tohoku University
-
- 吉田, 悠生
- Department of Advanced Materials Science, University of Tokyo
-
- 橋本, 顕一郎
- Department of Advanced Materials Science, University of Tokyo
-
- 大塚, 健一
- Department of Physics, Kyoto University
-
- 笠原, 裕一
- Department of Physics, Kyoto University
-
- 栗田, 伸之
- Department of Physics, Tokyo Institute of Technology
-
- 田中, 秀数
- Innovator and Inventor Development Platform, Tokyo Institute of Technology
-
- Noh, Pureum
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST)
-
- 那須, 譲治
- Department of Physics, Tohoku University
-
- Moon, Eun-Gook
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST)
-
- 松田, 祐司
- Department of Physics, Kyoto University
-
- 芝内, 孝禎
- Department of Advanced Materials Science, University of Tokyo
書誌事項
- タイトル別名
-
- Majorana-fermion origin of the planar thermal Hall effect in the Kitaev magnet α-RuCl₃
説明
The field-induced quantum-disordered state of layered honeycomb magnet α-RuCl₃ is a prime candidate for Kitaev spin liquids hosting Majorana fermions and non-Abelian anyons. Recent observations of anomalous planar thermal Hall effect demonstrate a topological edge mode, but whether it originates from Majorana fermions or bosonic magnons remains controversial. Here, we distinguish these origins from combined low-temperature measurements of high-resolution specific heat and thermal Hall conductivity with rotating magnetic fields within the honeycomb plane. A distinct closure of the low-energy bulk gap is observed for the fields in the Ru-Ru bond direction, and the gap opens rapidly when the field is tilted. Notably, this change occurs concomitantly with the sign reversal of the Hall effect. General discussions of topological bands show that this is the hallmark of an angle rotation–induced topological transition of fermions, providing conclusive evidence for the Majorana-fermion origin of the thermal Hall effect in α-RuCl₃.
収録刊行物
-
- Science Advances
-
Science Advances 10 (11), 2024-03
American Association for the Advancement of Science (AAAS)
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1050580992556427520
-
- ISSN
- 23752548
-
- HANDLE
- 2433/287384
-
- 本文言語コード
- en
-
- 資料種別
- journal article
-
- データソース種別
-
- IRDB
- Crossref
- KAKEN
- OpenAIRE