Study on the valley polarization control in transition metal dichalcogenides

• Project/Area Number: 15K13337
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Kyoto University
• Principal Investigator: Miyauchi Yuhei 京都大学, エネルギー理工学研究所, 准教授 (10451791)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 遷移金属ダイカルコゲナイド / バレートロニクス / バレー分極 / 励起子 / 光物性

Outline of Final Research Achievements

We explored methods for controlling exciton valley polarization in optically excited transition metal dichalcogenides. As a major achievement, we found that the valley polarization of excitons in monolayer tungsten diselenide can be tuned through modulations in carrier density, exciton linewidth, and exciton lifetimes induced by stacking on thin multilayer graphene substrate.

Research Products

• [Int'l Joint Research] National University of Singapore(Singapore)
• [Int'l Joint Research] Rice University(米国)
• [Int'l Joint Research] シンガポール国立大学(シンガポール)
• [Journal Article] Evidence for line width and carrier screening effects on excitonic valley relaxation in 2D semiconductors (2018)
  • Author(s): Y. Miyauchi, S. Konabe, F. Wang, W. Zhang, A. Hwang, Y. Hasegawa, L. Zhou, S. Mouri, M. Toh, G. Eda, K. Matsuda
  • Journal Title: Nature Communications Volume: 印刷中
  • NAID: 120006488629
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Self-Aligned and Scalable Growth of Monolayer WSe2-MoS2 lateral heterojunctions (2018)
  • Author(s): M-Y. Li, J. Pu, J-K. Huang, Y. Miyauchi, K. Matsuda, T. Takenobu, and L-J Li
  • Journal Title: Advanced Functional Materials Volume: 28 Issue: 17 Pages: 1706860-1706860
  • DOI: 10.1002/adfm.201706860
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Long radiative lifetimes of excitons in monolayer transition-metal dichalcogenides MX2 (M = Mo, W; X = S, Se) (2018)
  • Author(s): N. B. Mohamed, H. E. Lim, F. Wang, S. Koirala, S. Mouri, K. Shinokita, Y. Miyauchi, and K. Matsuda
  • Journal Title: Applied Physics Express Volume: 11 Issue: 1 Pages: 015201-015201
  • DOI: 10.7567/apex.11.015201
  • Peer Reviewed
• [Journal Article] Polarization-sensitive and broadband germanium sulfide photodetectors with excellent high-temperature performance (2017)
  • Author(s): D. Tan, W. Zhang, X. Wang, K. Sandhaya, Y. Miyauchi, and K. Matsuda
  • Journal Title: Nanoscale Volume: 9 Issue: 34 Pages: 12425-12431
  • DOI: 10.1039/c7nr03040a
  • Peer Reviewed
• [Journal Article] Thermal dissociation of inter-layer excitons in MoS2/MoSe2 hetero-bilayers (2017)
  • Author(s): S. Mouri, W. Zhang, D. Kozawa, Y. Miyauchi, G. Eda and K. Matsuda
  • Journal Title: Nanoscale Volume: 9 Issue: 20 Pages: 6674-6679
  • DOI: 10.1039/c7nr01598d
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evaluation of photoluminescence quantum yield of monolayer WSe2 using reference dye of 3-borylbithiophene derivative (2017)
  • Author(s): N. Baizura Mohamed, F. Wang, H. En Lim, W. Zhang, S. Koirala, S. Mouri, Y. Miyauchi, and K. Matsuda
  • Journal Title: Phys. Status. Solidi. B Volume: 254 Issue: 2 Pages: 1600563-1600563
  • DOI: 10.1002/pssb.201600563
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Observation of biexcitonic emission at extremely low power density in tungsten disulfide atomic layers grown on hexagonal boron nitride (2017)
  • Author(s): M. Okada, Y. Miyauchi, K. Matsuda, T. Taniguchi, K. Watanabe, H. Shinohara, and R. Kitaura
  • Journal Title: Scientific Report Volume: 7 Issue: 1 Pages: 322-322
  • DOI: 10.1038/s41598-017-00068-0
  • NAID: 120006305891
  • Peer Reviewed / Open Access
• [Journal Article] Chemical Doping Modulation of Nonlinear Photoluminescence Properties in Monolayer MoS2 (2016)
  • Author(s): Shinichiro Mouri,Yuhei Miyauchi, and Kazunari Matsuda,
  • Journal Title: Appl. Phys. Express Volume: 9 Issue: 5 Pages: 055202-055202
  • DOI: 10.7567/apex.9.055202
  • NAID: 210000137900
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Evidence for fast interlayer energy transfer in MoSe2/WS2 heterostructures (2016)
  • Author(s): D. Kozawa, A. Carvalho, I. Verzhbitskiy, F. Giustiniano, Y. Miyauchi, S. Mouri, A. H. Castro Neto, K. Matsuda, and G. Eda
  • Journal Title: Nano letters Volume: 16 Issue: 7 Pages: 4087-4093
  • DOI: 10.1021/acs.nanolett.6b00801
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Tuning of the photoluminescence and up-conversion photoluminescence properties of single-walled carbon nanotubes by chemical functionalization (2016)
  • Author(s): Y. Maeda, S. Minami, Y. Takehana, J-S. Dang, S. Aota, K. Matsuda, Y. Miyauchi, M. Yamada, M. Suzuki, R-S. Zhao, X. Zhaod, S. Nagase
  • Journal Title: Nanoscale Volume: 8 Issue: 38 Pages: 16916-16921
  • DOI: 10.1039/c6nr04214g
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Growth and optical properties of Nb-doped WS monolayers (2016)
  • Author(s): S. Sasaki, Y. Kobayashi, Z. Liu, K. Suenaga, Y. Maniwa, Y. Miyauch, Y. Miyata
  • Journal Title: Applied Physics Express Volume: 9 Issue: 7 Pages: 071201-071201
  • DOI: 10.7567/apex.9.071201
  • Peer Reviewed / Open Access
• [Journal Article] Upconversion photoluminescence imaging and spectroscopy of individual single-walled carbon nanotubes (2016)
  • Author(s): S. Aota, N. Akizuki, S. Mouri, K. Matsuda, Y. Miyauchi
  • Journal Title: Applied Phyiscs Express Volume: 9 Issue: 4 Pages: 045103-045103
  • DOI: 10.7567/apex.9.045103
  • NAID: 210000137859
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Fabrication and In Situ Transmission Electron Microscope Characterization of Free-Standing Graphene Nanoribbon Devices (2016)
  • Author(s): Q. Wang, R. Kitaura, S. Suzuki, Y. Miyauchi, K. Matsuda, Y. Yamamoto, S. Arai, H. Shinohara
  • Journal Title: ACS Nano Volume: 10 Issue: 1 Pages: 1475-1480
  • DOI: 10.1021/acsnano.5b06975
  • Peer Reviewed
• [Journal Article] Homogeneous linewidth broadening and exciton dephasing mechanism in MoTe2 (2016)
  • Author(s): S. Koirala, S. Mouri, Y. Miyauchi, K. Matsuda
  • Journal Title: Physical Review B Volume: 93 Issue: 7 Pages: 075411-075411
  • DOI: 10.1103/physrevb.93.075411
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Tunable electronic correlation effects in nanotube-light interactions (2015)
  • Author(s): Y. Miyauchi, Z. Zhang, M. Takekoshi, Y. Tomio, H. Suzuura, V. Perebeinos, V. V. Deshpande, C. Lu, S. Berciaud, P. Kim, J. Hone, T. F. Heinz
  • Journal Title: Physical Review B Volume: 92 Issue: 20 Pages: 205407-205407
  • DOI: 10.1103/physrevb.92.205407
  • NAID: 120005712921
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Efficient near-infrared up-conversion photoluminescence in carbon nanotubes (2015)
  • Author(s): N. Akizuki, S. Aota, S. Mouri, K. Matsuda, Y. Miyauchi
  • Journal Title: Nature Communications Volume: 6 Issue: 1 Pages: 8920-8920
  • DOI: 10.1038/ncomms9920
  • NAID: 120005670980
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Enhanced photovoltaic performances of graphene/Si solar cells by insertion of MoS2 thin film (2015)
  • Author(s): Y. Tsuboi, F.Wang, D. Kozawa, K. Funahashi, S. Mouri, Y. Miyauchi, T. Takenobu, K. Matsuda
  • Journal Title: Nanoscale Volume: 7 Issue: 34 Pages: 14476-14482
  • DOI: 10.1039/c5nr03046c
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Photoluminescence properties of monolayer MoS2 in an aqueous solution (2018)
  • Author(s): W. Zhang, K. Matsuda, Y. Miyauchi
  • Organizer: APS March Meeting 2018
  • Int'l Joint Research
• [Presentation] Photoluminescence properties of twisted bilayer transition metal dichalcogenides (2018)
  • Author(s): M. Shimasaki, W. Zhang, X. Wang, T. Taniguchi, K. Watanabe, K. Matsuda, Y. Miyauchi
  • Organizer: 第54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
• [Presentation] 単層WSe2 における励起子バレー分極の緩和機構 (2017)
  • Author(s): 宮内雄平,小鍋哲,王飛久,長谷川勇介, 毛利真一郎, 松田一成
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学 豊中キャンパス
  • Year and Date: 2017-03-17
• [Presentation] Optical spectroscopy on monolayer transition metal dichalcogenides immersed in an aqueous solution (2017)
  • Author(s): W. Zhang, Y. Hasegawa, K. Matsuda, .Y. Miyauchi
  • Organizer: 第52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
  • Place of Presentation: 東京大学 伊藤国際学術研究センター 伊藤謝恩ホール
  • Year and Date: 2017-03-01
• [Presentation] 低次元ナノ物質の光物性工学とその応用 (2017)
  • Author(s): 宮内雄平
  • Organizer: 第24回京都大学宇治キャンパス産学交流会
  • Invited
• [Presentation] 原子層物質のバレー励起子光物性 (2017)
  • Author(s): 宮内雄平
  • Organizer: 応用電子物性分科会 研究例会-二次元層状物質研究の最前線-
  • Invited
• [Presentation] Linewidth and carrier screening effects on exciton valley relaxation in monolayer transition metal dichalcogenides (2017)
  • Author(s): Y. Miyauchi
  • Organizer: The 3rd International Conference on 2D Materials and Technology
  • Int'l Joint Research / Invited
• [Presentation] 原子層物質の励起子バレー緩和 (2017)
  • Author(s): 宮内雄平
  • Organizer: CUPALワークショップ トポロジカル物質・原子層物質の新規物性
  • Invited
• [Presentation] Substrate and sample dependent exciton transport properties in monolayer transition metal dichalcogenides (2017)
  • Author(s): W. Zhang, A. Hwang, T. Saito, Y. Kobayashi, T. Taniguchi, K. Watanabe, Y. Miyata, K. Matsuda, Y. Miyauchi
  • Organizer: 第53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
• [Presentation] Valley polarization mapping in transition metal dichalcogenides heterostructures (2016)
  • Author(s): Yusuke Hasegawa, Shinichiro Mouri, Kazunari Matsuda, Yuhei Miyauchi
  • Organizer: 第51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
  • Place of Presentation: 北海道立道民活動センター かでる2・7
  • Year and Date: 2016-09-07
• [Presentation] Polarization-resolved photoluminescence spectroscopy on monolayer transition metal dichalcogenides under electrostatic gating (2016)
  • Author(s): Wenjin Zhang, Yusuke Hasegawa, Shinichiro Mouri, Kazunari Matsuda, Yuhei Miyauchi
  • Organizer: 第51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
  • Place of Presentation: 北海道立道民活動センター かでる2・7
  • Year and Date: 2016-09-07
• [Presentation] カーボンナノチューブにおける励起子の物理と工学 (2016)
  • Author(s): 宮内雄平
  • Organizer: 第50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
  • Place of Presentation: 東京大学 伊藤国際学術研究センター 伊藤謝恩ホール
  • Year and Date: 2016-02-20
  • Invited
• [Presentation] 単層遷移金属ダイカルコゲナイドの偏光分解発光マッピング (2016)
  • Author(s): 長谷川勇介, 王飛久, 青田駿, 毛利真一郎, 松田一成, 宮内雄平
  • Organizer: 第50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
  • Place of Presentation: 東京大学 伊藤国際学術研究センター 伊藤謝恩ホール
  • Year and Date: 2016-02-20
• [Presentation] カーボンナノチューブの光物性工学 (2016)
  • Author(s): 宮内雄平
  • Organizer: ナノカーボン研究部門ワークショップ2015
  • Place of Presentation: 東京理科大学神楽坂キャンパス
  • Year and Date: 2016-01-13
  • Invited
• [Presentation] Emergent optical phenomena in carbon nanotubes (2015)
  • Author(s): Yuhei Miyauchi
  • Organizer: The 2015 International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Hawaii Convention Center, Hawaii, USA
  • Year and Date: 2015-12-15
  • Int'l Joint Research / Invited
• [Presentation] 単層カーボンナノチューブのアップコンバージョン発光 (2015)
  • Author(s): 青田駿, 秋月直人,毛利真一郎, 松田一成, 宮内雄平
  • Organizer: 第26回 光物性研究会
  • Place of Presentation: 神戸大学 百年記念会館
  • Year and Date: 2015-12-11
  • Invited
• [Presentation] ナノカーボン・原子層物質の光機能 (2015)
  • Author(s): 宮内雄平
  • Organizer: 第19回 VBLシンポジウム（2015年度）
  • Place of Presentation: 名古屋大学フロンティアプラザ
  • Year and Date: 2015-11-09
  • Invited
• [Presentation] Upconversion photoluminescence properties of individual single-walled carbon nanotubes (2015)
  • Author(s): S. Aota, N. Akizuki, Y. Ogawa, S. Mouri, K. Matsuda, Y. Miyauchi
  • Organizer: The 16th International Conference on the Science and Application of Nanotubes (NT15)
  • Place of Presentation: Nagoya University, Nagoya, Japan
  • Year and Date: 2015-06-29
  • Int'l Joint Research
• [Presentation] Observation of efficient upconversion photoluminescence of carbon nanotubes under one-photon excitation conditions (2015)
  • Author(s): Y. Miyauchi, N. Akizuki, S. Mouri, K. Matsuda
  • Organizer: WONTON’15 (6th Workshop on Nanotube Optics and Nanospectroscopy)
  • Place of Presentation: Kloster Banz, Germany
  • Year and Date: 2015-06-01
  • Int'l Joint Research
• [Presentation] Observation of Efficient Upconversion Photoluminescence of Single-Walled Carbon Nanotubes (2015)
  • Author(s): Y. Miyauchi, K. Matsuda
  • Organizer: 227th ECS Meeting
  • Place of Presentation: Chicago, Illinois, California, USA
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Remarks]
  • URL: http://www.iae.kyoto-u.ac.jp/conv/miyauchi/indexj.html
• [Remarks]
  • URL: http://www.iae.kyoto-u.ac.jp/conv/miyauchi/indexj.html