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Ultrafast spin injection in graphene via dynamical carrier filtering at transition metal dichalcogenide interfaces
https://repo.qst.go.jp/records/2002987
https://repo.qst.go.jp/records/2002987885066c7-60f0-4012-bf16-c52f039ff0cb
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||
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| 公開日 | 2026-03-23 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Ultrafast spin injection in graphene via dynamical carrier filtering at transition metal dichalcogenide interfaces | |||||||||||
| 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 |
Yamada Shunsuke
× Yamada Shunsuke
× Arqum Hashmi
× Otobe Tomohito
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | We report a real-time first-principles study of ultrafast spin injection in a WSe$_2$-graphene heterobilayer under circularly polarized laser irradiation, using time-dependent density functional theory. Contrary to conventional expectations, spin transfer into graphene is not a passive process but is actively driven by spin-selective carrier filtering at the interface. Spin-polarized carriers generated in the WSe$_2$ layer induce a preferential migration of opposite-spin carriers from graphene, which results in net spin magnetization in graphene. This process is governed by interlayer band offsets, density-of-state asymmetry, and Pauli blocking.These findings indicate a microscopic mechanism of spin injection in non-magnetic systems and identify a guiding principle for the design of ultrafast opto-spintronic functionalities in van der Waals heterostructures. | |||||||||||
| 書誌情報 |
Physical Review Research 巻 8, p. 013300, 発行日 2026-03 |
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| 出版者 | ||||||||||||
| 出版者 | American Physical Society | |||||||||||
| DOI | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | 10.1103/xslx-wnb6 | |||||||||||
