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Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors
https://oist.repo.nii.ac.jp/records/2524
https://oist.repo.nii.ac.jp/records/25240dda7756-ea95-44c1-8f92-758dd6a4b28c
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Accepted Manuscript+Suppplementary combined_Re (1.9 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2022-01-18 | |||||
| タイトル | ||||||
| タイトル | Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors | |||||
| 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（英） |
Madéo, Julien
× Madéo, Julien× Man, Michael K. L.× Sahoo, Chakradhar× Campbell, Marshall× Pareek, Vivek× Wong, E. Laine× Al-Mahboob, Abdullah× Chan, Nicholas S.× Karmakar, Arka× Mariserla, Bala Murali Krishna× Li, Xiaoqin× Heinz, Tony F.× Cao, Ting× Dani, Keshav M. |
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| 書誌情報 |
en : Science 巻 370, 号 6521, p. 1199-1204, 発行日 2020-12-04 |
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| 抄録 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Resolving momentum degrees of freedom of excitons, which are electron-hole pairs bound by the Coulomb attraction in a photoexcited semiconductor, has remained an elusive goal for decades. In atomically thin semiconductors, such a capability could probe the momentum-forbidden dark excitons, which critically affect proposed opto-electronic technologies but are not directly accessible using optical techniques. Here, we probed the momentum state of excitons in a tungsten diselenide monolayer by photoemitting their constituent electrons and resolving them in time, momentum, and energy. We obtained a direct visual of the momentum-forbidden dark excitons and studied their properties, including their near degeneracy with bright excitons and their formation pathways in the energy-momentum landscape. These dark excitons dominated the excited-state distribution, a surprising finding that highlights their importance in atomically thin semiconductors. | |||||
| 出版者 | ||||||
| 出版者 | American Association for the Advancement of Science | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0036-8075 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1095-9203 | |||||
| PubMed番号 | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | PMID | |||||
| 関連識別子 | info:pmid/33273099 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1126/science.aba1029 | |||||
| 権利 | ||||||
| 権利情報 | © 2022 The Author(s). This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on volume 370, Dec. 4, 2020, DOI: 10.1126/science.aba1029. | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.science.org/doi/10.1126/science.aba1029 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
