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  1. B100 理学部/理学研究科
  2. B100a 雑誌掲載論文
  3. 学術雑誌

Enhanced Exciton–Exciton Collisions in an Ultraflat Monolayer MoSe2 Prepared through Deterministic Flattening

http://hdl.handle.net/2237/0002001624
http://hdl.handle.net/2237/0002001624
5d7d38f4-c5f8-4c0f-bb43-c4ad95ac9783
名前 / ファイル ライセンス アクション
AFMsqueezingACSNano2021.pdf AFMsqueezingACSNano2021.pdf (881 KB)
Item type itemtype_ver1(1)
公開日 2021-11-15
タイトル
タイトル Enhanced Exciton–Exciton Collisions in an Ultraflat Monolayer MoSe2 Prepared through Deterministic Flattening
言語 en
著者 Hotta, Takato

× Hotta, Takato

en Hotta, Takato

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Ueda, Akihiko

× Ueda, Akihiko

en Ueda, Akihiko

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Higuchi, Shohei

× Higuchi, Shohei

en Higuchi, Shohei

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Okada, Mitsuhiro

× Okada, Mitsuhiro

en Okada, Mitsuhiro

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Shimizu, Tetsuo

× Shimizu, Tetsuo

en Shimizu, Tetsuo

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Kubo, Toshitaka

× Kubo, Toshitaka

en Kubo, Toshitaka

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Ueno, Keiji

× Ueno, Keiji

en Ueno, Keiji

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Taniguchi, Takashi

× Taniguchi, Takashi

en Taniguchi, Takashi

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Watanabe, Kenji

× Watanabe, Kenji

en Watanabe, Kenji

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Kitaura, Ryo

× Kitaura, Ryo

en Kitaura, Ryo

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
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
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.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 ACS Publications
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1021/acsnano.0c08642
収録物識別子
収録物識別子タイプ PISSN
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
ファイル公開日
日付 2022-01-26
日付タイプ Available
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