Item type |
itemtype_ver1(1) |
公開日 |
2021-11-15 |
タイトル |
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タイトル |
Enhanced Exciton–Exciton Collisions in an Ultraflat Monolayer MoSe2 Prepared through Deterministic Flattening |
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言語 |
en |
著者 |
Hotta, Takato
Ueda, Akihiko
Higuchi, Shohei
Okada, Mitsuhiro
Shimizu, Tetsuo
Kubo, Toshitaka
Ueno, Keiji
Taniguchi, Takashi
Watanabe, Kenji
Kitaura, Ryo
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アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
権利 |
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言語 |
en |
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権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in [ACS Nano], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [https://pubs.acs.org/articlesonrequest/AOR-EXV4BMY3PYNM8UC4E5MF].” |
内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
Squeezing bubbles and impurities out of interlayer spaces by applying force through a few-layer graphene capping layer leads to van der Waals heterostructures with the ultraflat structure free from random electrostatic potential arising from charged impurities. Without the graphene capping layer, a squeezing process with an AFM tip induces applied-force-dependent charges of Δn ∼ 2 × 10^12 cm^–2 μN^–1, resulting in the significant intensity of trions in photoluminescence spectra of MoSe2 at low temperature. We found that a hBN/MoSe2/hBN prepared with the “graphene-capping-assisted AFM nano-squeezing method” shows a strong excitonic emission with negligible trion peak, and the residual line width of the exciton peak is only 2.2 meV, which is comparable to the homogeneous limit. Furthermore, in this high-quality sample, we found that the formation of biexciton occurs even at extremely low excitation power (Φph ∼ 2.3 × 10^19 cm^–2 s^–1) due to the enhanced collisions between excitons. |
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言語 |
en |
出版者 |
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出版者 |
ACS Publications |
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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 |
出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
関連情報 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1021/acsnano.0c08642 |
収録物識別子 |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
1936-0851 |
書誌情報 |
en : ACS Nano
巻 15,
号 1,
p. 1370-1377,
発行日 2021-01-26
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ファイル公開日 |
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日付 |
2022-01-26 |
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日付タイプ |
Available |