| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-10-30 |
| タイトル |
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タイトル |
Ultrafast Optical Control of Multi-Valley States in 2D SnS |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Hashmi Arqum
M. Umar Farooq
Tani Mizuki
Yabana Kazuhiro
Otobe Tomohito
Kenichi L. Ishikawa
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
We theoretically study the ultrafast optical control of multiple valley states in two‐dimensional (2D) tin sulfide (SnS) monolayers, a member of the layered group-IV monochalcogenides, which is a promising class of materials for overcoming current challenges in valleytronics. By combining time‐dependent density functional theory with Maxwell’s equations, we simulate how both linearly and circularly polarized ultrashort laser pulses affect the electronic excitation dynamics and valley polarization in SnS. Our results reveal that the corrugated phosphorene like crystal structure of SnS monolayers leads to the emergence of both linear and circular dichroism, allowing flexible manipulation of multi-valley excitation by simply adjusting the light polarization. Moreover, the interplay between broken inversion symmetry and spin-orbit coupling gives rise to distinct Berry curvature effects and spin valley coupling, thereby enabling circular dichroism. Furthermore, we propose that tuning the carrier‐envelope phase of few-cycle femtosecond laser pulses can achieve sub‐cycle, ultrafast switching among multiple valley states. These findings not only deepen our understanding of valley dynamics in 2D materials but may also open new avenues for the development of valleytronic devices. |
| 書誌情報 |
Physical Review Materials
巻 9,
号 10,
p. 104003-1-104003-12,
発行日 2025-10
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| 出版者 |
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出版者 |
The American Physical Society |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/jm56-qldh |
