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Reversible structure change in graphene/metal interface by intercalation and deintercalation
https://repo.qst.go.jp/records/2000944
https://repo.qst.go.jp/records/2000944d2fd7168-77a4-4b18-b325-20a86b78b4fc
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||
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| 公開日 | 2025-06-05 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Reversible structure change in graphene/metal interface by intercalation and deintercalation | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| 著者 |
Yuki Fukaya
× Yuki Fukaya
× Entani Shiro
× Sakai Seiji
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | Intercalation in two-dimensional materials is an important degree of freedom to modify the structural and electronic properties. In this paper, the atomic arrangements at the interface between single-layer graphene and Co(0001) with intercalated Ag and Au atoms were investigated using total-reflection high-energy positron diffraction. A structure analysis on the basis of dynamical diffraction theory demonstrates that by intercalation at annealing temperatures above 400 ?C, the graphene height from the underlying atoms is shifted from 2.04 A to 3.24 A for Ag and 3.32 A for Au. The Debye temperatures of graphene are changed from 430 K to 320 K for Ag and 368 K for Au by the intercalation. These changes indicate that intercalation results in the transformation to quasifreestanding graphene via a van der Waals interaction. For Ag, further annealing at 700 ?C enables the graphene height and the Debye temperature to restore the pristine values by Ag deintercalation. However, for Au, the graphene height remains high up to 900 ?C, which indicates the absence of deintercalation. The obtained results reveal a reversible structure change in the graphene/Co(0001) interface by Ag intercalation and deintercalation. The difference in the deintercalation between Ag and Au atoms can be explained by the activation energy of thermal desorption. | |||||||||||
| 書誌情報 |
Physical Review B 巻 108, p. 155422, 発行日 2023-10 |
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| 出版者 | ||||||||||||
| 出版者 | アメリカ物理学会 | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||
| 収録物識別子 | 2469-9969 | |||||||||||
| DOI | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | 10.1103/PhysRevB.108.155422 | |||||||||||
