ナノ構造体の局所力学場制御によるバレートロニクスデバイスの創製

2021 Fiscal Year Annual Research Report

• Project Area: New Materials Science on Nanoscale Structures and Functions of Crystal Defect Cores
• Project/Area Number: 20H05189
• Research Institution: Nagoya University
• Principal Investigator: 蒲 江 名古屋大学, 工学研究科, 助教 (00805765)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: 遷移金属ダイカルコゲナイド / ヘテロ接合 / 円偏光 / バレー分極 / 電解質 / 歪み効果

Outline of Annual Research Achievements

本研究の目標は、原子層物質において力学特性がもたらす局所電子構造変化を解明・制御することで、新しい光・電子機能（オプト・バレートロニクス）デバイスの実現を目指す。具体的には、空間反転対称性が破れた原子層物質、遷移金属ダイカルコゲナイド（TMDC）が有する、波数空間における磁気的に非等価なバレーを力学的に制御する手法を確立し、これにより生じるバレー流を新たな自由度とするデバイスの作製を目的とする。
本研究目的に対し、本年度は（I）ヘテロ界面歪みによる室温円偏光発光の生成・制御と、（II）歪みを利用した高偏極率な円偏光発光素子の設計、の2項目について取り組んだ。以下にそれぞれの項目に関して研究実績の概要を示す。
（I）原子層ヘテロ接合を用いた室温円偏光発光素子
まず化学成長したTMDC面内ヘテロ単層膜を用いて電解質発光素子を作製し、ヘテロ界面からの電流励起発光を直接観測した。次に、界面発光の円偏光分解を測定したところ、室温において10%以上の高い円偏光分極が観測された。最後、ヘテロ界面の原子配列を電子顕微鏡で評価した結果、界面歪みが室温円偏光生成の起源であることを明らかにした。原子層ヘテロ構造は、化学合成による多様な材料展開や、大面積化・パターニング技術も適用でき、材料設計による高効率な円偏光発光素子が期待できる。
（II）歪みによる高偏極率な室温円偏光発光素子の設計
上記の結果及び昨年度の成果により、TMDCの力学制御が円偏光発光の生成・制御に極めて有用な手法であることが示された。最後、100%室温円偏光発光を実現するための最適な歪み効果（強度・方位）及び電場等のデバイスパラメータを、理論計算によりシミュレーションを行った。その結果、現状のデバイス設計において歪みを増大することで、今後100%室温円偏光発光素子の作製が実験的に達成可能であることが明らかとなった。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

Remarks

プレスリリース

Research Products

• [Int'l Joint Research] The University of Hong Kong/National Sun Yat-sen University(中国)
  • Country Name: CHINA
  • Counterpart Institution: The University of Hong Kong/National Sun Yat-sen University
• [Journal Article] Electric-field-induced metal-insulator transition and quantum transport in large-area polycrystalline MoS2 monolayers (2022)
  • Author(s): Hao Ou, Tomoyuki Yamada, Masaya Mitamura, Yusuke Edagawa, Tatsuma D. Matsuda, Kazuhiro Yanagi, Chang-Hsiao Chen, Lain-Jong Li, Taishi Takenobu, Jiang Pu
  • Journal Title: Physical Review Materials Volume: Just accepted Pages: Just accepted
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Formation of a Two-Dimensional Electronic System in Laterally Assembled WTe Nanowires (2022)
  • Author(s): Hiroshi Shimizu, Jiang Pu, Zheng Liu, Hong En Lim, Mina Maruyama, Yusuke Nakanishi, Shunichiro Ito, Iori Kikuchi, Takahiko Endo, Kazuhiro Yanagi, Yugo Oshima, Susumu Okada, Taishi Takenobu, Yasumitsu Miyata
  • Journal Title: ACS Applied Nano Materials Volume: Just accepted Pages: Just accepted
  • DOI: 10.1021/acsanm.2c00377
  • Peer Reviewed
• [Journal Article] Nanowire-to-Nanoribbon Conversion in Transition-Metal Chalcogenides: Implications for One-Dimensional Electronics and Optoelectronics (2021)
  • Author(s): Hong En Lim, Zheng Liu, Juan Kim, Jiang Pu, Hiroshi Shimizu, Takahiko Endo, Yusuke Nakanishi, Taishi Takenobu, Yasumitsu Miyata
  • Journal Title: ACS Applied Nano Materials Volume: 5 Pages: 1775-1782
  • DOI: 10.1021/acsanm.1c03160
  • Peer Reviewed
• [Journal Article] Recent Advances in Light-Emitting Electrochemical Cells with Low-Dimensional Quantum Materials (2021)
  • Author(s): Jiang Pu, Taishi Takenobu
  • Journal Title: Journal of the Imaging Society of Japan Volume: 60 Pages: 656-672
  • DOI: 10.11370/isj.60.656
  • Peer Reviewed
• [Journal Article] Room-Temperature Chiral Light-Emitting Diode Based on Strained Monolayer Semiconductors (2021)
  • Author(s): Jiang Pu, Wenjin Zhang, Hirofumi Matsuoka, Yu Kobayashi, Yuhei Takaguchi, Yasumitsu Miyata, Kazunari Matsuda, Yuhei Miyauchi, Taishi Takenobu
  • Journal Title: Advanced Materials Volume: 33 Pages: 2100601
  • DOI: 10.1002/adma.202100601
  • Peer Reviewed
• [Journal Article] Spatial Control of Dynamic p-i-n Junctions in Transition Metal Dichalcogenide Light-Emitting Devices (2021)
  • Author(s): Hao Ou, Hirofumi Matsuoka, Juliette Tempia, Tomoyuki Yamada, Togo Takahashi, Koshi Oi, Yuhei Takaguchi, Takahiko Endo, Yasumitsu Miyata, Chang-Hsiao Chen, Lain-Jong Li, Jiang Pu, Taishi Takenobu
  • Journal Title: ACS Nano Volume: 15 Pages: 12911-12921
  • DOI: 10.1021/acsnano.1c01242
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Electric Double Layer Doping of Charge-Ordered Insulators α-(BEDT-TTF)2I3; and α-(BETS)2I3 (2021)
  • Author(s): Yoshitaka Kawasugi, Hikaru Masuda, Jiang Pu, Taishi Takenobu, Hiroshi M. Yamamoto, Reizo Kato, Naoya Tajima
  • Journal Title: Crystals Volume: 11 Pages: 791
  • DOI: 10.3390/cryst11070791
  • Peer Reviewed
• [Journal Article] Air-stable and efficient electron doping of monolayer MoS2 by salt-crown ether treatment (2021)
  • Author(s): Hiroto Ogura, Masahiko Kaneda, Yusuke Nakanishi, Yoshiyuki Nonoguchi, Jiang Pu, Mari Ohfuchi, Toshifumi Irisawa, Hong En Lim, Takahiko Endo, Kazuhiro Yanagi, Taishi Takenobu, Yasumitsu Miyata
  • Journal Title: Nanoscale Volume: 13 Pages: 8784-8789
  • DOI: 10.1039/D1NR01279G
  • Peer Reviewed
• [Presentation] 量子スピン液体候補物質κ-(BEDT-TTF)_2_Cu_2_(CN)_3_に対するひずみ効果と電界効果Ⅱ (2022)
  • Author(s): 櫻糀大仁, 川椙義高, 蒲江, 竹延大志, 加藤礼三, 山本浩史, 田嶋尚也
  • Organizer: 日本物理学会 第77回年次大会
• [Presentation] Intercalation of group-XIII metals in crystalline bundles of WTe atomic wires (2022)
  • Author(s): Ryusuke Natsui, Hiroshi Shimizu, Zheng Liu, Iori Kikuchi, Jiang Pu, Taishi Takenobu, Hong En Lim, Takahiko Endo, Yusuke Nakanishi, Yasumitsu Miyata
  • Organizer: 第62回 フラーレン・ナノチューブ・グラフェン総合シンポジウム
  • Int'l Joint Research
• [Presentation] Monolayer in-plane heterojunction light-emitting devices with tunable composition distribution (2022)
  • Author(s): Jiang Pu
  • Organizer: A3 The 9th International Workshop on 2D Materials
  • Int'l Joint Research / Invited
• [Presentation] Electric-Field-Induced Metal-Insulator Transition and Quantum Transport in Large-Area Polycrystalline MoS2 Monolayers (2022)
  • Author(s): Hao Ou, Jaing Pu, Taishi Takenobu
  • Organizer: A3 The 9th International Workshop on 2D Materials
  • Int'l Joint Research
• [Presentation] ゲル状電解質を用いた機能性発光デバイス (2021)
  • Author(s): 蒲江
  • Organizer: レーザー学会第 560 回研究会 「有機コヒーレントフォトニクス」
  • Invited
• [Presentation] 高色純度青色発光低分子ν-DABNA を用いた電気化学発光セル (2021)
  • Author(s): 田中 友規, 蒲 江, 畠山 琢次, 竹延 大志
  • Organizer: レーザー学会第 560 回研究会 「有機コヒーレントフォトニクス」
• [Presentation] Ultrapure-blue Light-emitting Electrochemical Cell Using ν-DABNA (2021)
  • Author(s): Yuki Tanaka, Jiang Pu, Takuji Hatakeyama, Taishi Takenobu
  • Organizer: MNC2021
  • Int'l Joint Research
• [Presentation] Air-stable, efficient n-type doping of MoS2 by salt-crown ether treatment (2021)
  • Author(s): Hiroto Ogura, Masahiko Kaneda, Yusuke Nakanishi, Yoshiyuki Nonoguchi, Jiang Pu, Mari Ohfuchi, Toshifumi Irisawa, Hong En Lim, Takahiko Endo, Kazuhiro Yanagi, Taishi Takenobu, Yasumitsu Miyata
  • Organizer: MNC2021
  • Int'l Joint Research
• [Presentation] Air-stable n-type doping of monolayer MoS2 by crown-ether complexe (2021)
  • Author(s): Hiroto Ogura, Masahiko Kaneda, Yusuke Nakanishi, Yoshiyuki Nonoguchi, Jiang Pu, Mari Ohfuchi, Toshifumi Irisawa, Hong En Lim, Takahiko Endo, Kazuhiro Yanagi, Taishi Takenobu, Yasumitsu Miyata
  • Organizer: RPGR2021
  • Int'l Joint Research
• [Presentation] Chiral electroluminescence in monolayer lateral heterojunctions (2021)
  • Author(s): Jiang Pu, Naoki Wada, Wenjin Zhang, Yuhei Takaguchi, Kazunari Matsuda, Yuhei, Miyauchi, Yasumitsu Miyata, Taishi Takenobu
  • Organizer: RPGR2021
  • Int'l Joint Research
• [Presentation] Spatial Control of Dynamic p-i-n Junctions in Transition Metal Dichalcogenide Light-Emitting Devices (2021)
  • Author(s): Hao Ou, Hirofumi Matsuoka, Juliette Tempia, Tomoyuki Yamada, Togo Takahashi, Koshi Oi, Yuhei Takaguchi, Takahiko Endo, Yasumitsu Miyata, Chang-Hsiao Chen, Lain-Jong Li, Jiang Pu1, Taishi Takenobu
  • Organizer: RPGR2021
  • Int'l Joint Research
• [Presentation] Large-area Superconducting NbSe2 Films with Nearly Isotropic Large Upper Critical Field (2021)
  • Author(s): Togo Takahashi, Chisato Ando, Mitsufumi Saito, Yasumitsu Miyata, Yusuke Nakanishi, Jiang Pu, Taishi Takenobu
  • Organizer: RPGR2021
  • Int'l Joint Research
• [Presentation] Wafer-Scale Growth of 1D Transition Metal Telluride Atomic Wires (2021)
  • Author(s): Hong En Lim1, Yusuke Nakanishi, Zheng Liu , Jiang Pu, Mina Maruyama, Takahiko Endo, Chisato Ando, Hiroshi Shimizu, Kazuhiro Yanagi, Susumu Okada, Taishi Takenobu, Yasumitsu Miyata
  • Organizer: RPGR2021
  • Int'l Joint Research
• [Presentation] Ultrapure-blue Light-emitting Electochemical Cell Using ν-DABNA (2021)
  • Author(s): Yuki Tanaka, Jiang Pu, Takuji Hatakeyama, Taishi Takenobu
  • Organizer: ICFPE2021
  • Int'l Joint Research
• [Presentation] 歪み印加したWS2/WSe2ファンデルワールスヘテロ構造の光学特性 (2021)
  • Author(s): 福井 遼太郎, 宇佐美 怜, 鈴木 壮磨, 高橋 統吾, 遠藤 尚彦, 宮田 耕充, 北浦 良, 蒲 江, 竹延 大志
  • Organizer: 日本物理学会
• [Presentation] 三次元構造を有する大面積NbSe2薄膜の超伝導特性 (2021)
  • Author(s): 高橋 統吾, 安藤 千里, 斎藤 光史, 宮田 耕充, 中西 勇介, 蒲 江, 竹延 大志
  • Organizer: 日本物理学会
• [Presentation] Light-Emitting Electrochemical Cells for Functional Optoelectronic Device Applications (2021)
  • Author(s): Jiang Pu
  • Organizer: 錯体化学会第71回討論会
  • Invited
• [Presentation] 遷移金属ダイカルコゲナイドを用いた微小共振器発光デバイス (2021)
  • Author(s): 鈴木 壮磨，小椋 友寛1，遠藤 尚彦，宮田 耕充，山下 健一, 蒲 江，竹延 大志
  • Organizer: 応用物理学会
• [Presentation] 気体原料を用いた1T′相WS2の化学気相成長 (2021)
  • Author(s): 岡田 光博，林 永昌，菊地 伊織，岡田 直也，張 文馨，清水 哲夫，久保 利隆，蒲 江，竹延 大志，山田 貴壽，入沢 寿史
  • Organizer: 応用物理学会
• [Presentation] 高色純度青色発光低分子νーDABNA を用いた LEC (2021)
  • Author(s): 田中友規、 蒲 江、 畠山 琢次、 竹延 大志
  • Organizer: 応用物理学会
• [Presentation] 単層WS2における異常光起電力効果 (2021)
  • Author(s): 高橋 統吾, 蒲 江, 遠藤 尚彦, 宮田 耕充, 竹延 大志
  • Organizer: 応用物理学会
• [Presentation] Electrical Transport Properties of W6Te6 Nanowire Network Films (2021)
  • Author(s): Iori Kikuchi, Hiroshi Shimizu, Lim Hong En, Takahiko Endo, Yusuke Nakanishi, Yasumitsu Miyata, Jiang Pu, Taishi Takenobu
  • Organizer: The 61st Fullerenes-Nanotubes-Graphene General Symposium
  • Int'l Joint Research
• [Presentation] Wire-to-Ribbon Conversion in Transition Metal Chalcogenides (2021)
  • Author(s): Hong En Lim, Zheng Liu, Jiang Pu, Hiroshi Shimizu, Takahiko Endo, Yusuke Nakanishi, Taishi Takenobu, Yasumitsu Miyata
  • Organizer: The 61st Fullerenes-Nanotubes-Graphene General Symposium
  • Int'l Joint Research
• [Presentation] Electrolyte-based transition metal dichalcogenide light-emitting devices with microcavity (2021)
  • Author(s): Soma Suzuki, Tomohiro Ogura, Takahiko Endo, Yasumitsu Miyata, Kenichi Yamashita, Jiang Pu, Taishi Takenobu
  • Organizer: The 61st Fullerenes-Nanotubes-Graphene General Symposium
  • Int'l Joint Research
• [Presentation] Anomalous Photovoltaic Effect in Strained Monolayer WS2 (2021)
  • Author(s): Togo Takahashi, Jiang Pu, Takahiko Endo, Yasumitsu Miyata, Taishi Takenobu
  • Organizer: The 61st Fullerenes-Nanotubes-Graphene General Symposium
  • Int'l Joint Research
• [Presentation] The strain effect of optical properties on hetetostructure (2021)
  • Author(s): Rei Usami, Ryotaro Fukui, Takahiko Endo, Yasumitsu Miyata, Souma Suzuki, Togo Takahashi, Ryo Kitaura, Jiang Pu, Taishi Takenobu
  • Organizer: The 61st Fullerenes-Nanotubes-Graphene General Symposium
  • Int'l Joint Research
• [Remarks] 世界初！室温で右巻き・左巻き円偏光発光を自在に切替 ～次世代量子通信の光源技術としての応用に期待～
  • URL: https://www.nagoya-u.ac.jp/about-nu/public-relations/researchinfo/upload_images/20210727_engg.pdf