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Study of valley caloritoronics in transition metal dichalcogenides

Research Project

Project/Area Number 17K18748
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Ideue Toshiya  東京大学, 大学院工学系研究科(工学部), 助教 (90757014)

Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords遷移金属ダイカルコゲナイド / バレートロニクス / 励起子 / 熱輸送 / ホール効果 / 二次元物質
Outline of Final Research Achievements

We studied the characteristic valley transport originating from thermal or chemical potential gradient in a monolayer transition metal dichalcogenide, in which valley degree of freedom couples with circular polarized light or electron spin. We discovered that valley-polarized exciton can diffuse over several micrometers in a monolayer transition metal dichalcogenide and shows the valley-dependent Hall effect. In addition, we further studied the optical properties of the interface between a monolayer transition metal dichalcogenide and ferrimagnetic or antiferromagnetic insulators. We observed spin-dependent or magnon-mediated valley relaxation, which has been only studied in the interface of a monolayer transition metal dichalcogenide and ferromagnetic insulator so far. Our results pave a new way for studying the thermally driven valley transport and spin-related valley physics.

Academic Significance and Societal Importance of the Research Achievements

本研究は、熱勾配や化学ポテンシャル勾配に由来するバレー輸送に着目したユニークな研究であり、発見した特徴的バレー輸送現象は、バレートロニクスの飛躍的発展に寄与する成果である。励起子ホール効果はバレー偏極励起子流の方向制御に有望であると同時に、バレー流生成の基本的手法になり得る可能性があり、本現象を契機としたバレートロニクス研究の新展開が期待される。また、遷移金属ダイカルコゲナイドとフェリ磁性体や反強磁性体の界面において観測した特徴的バレー・スピン緩和現象は、バレートロニクスとスピントロニクスを橋渡しする重要な成果であり、今後他分野とのさらなる学理融合と相互発展が望まれる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (25 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (17 results) (of which Int'l Joint Research: 12 results,  Invited: 10 results) Remarks (1 results)

  • [Int'l Joint Research] Holon Inst. of Tech./Weizmann Inst. of Science(イスラエル)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Max Planck Institute(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Diameter-dependent superconductivity in individual WS2 nanotubes2018

    • Author(s)
      F. Qin, T. Ideue W. Shi, X. Zhang, M. Yoshida, A. Zak, R. Tenne, T. Kikitsu, D. Inoue, D. Hashizume, and Y. Iwasa
    • Journal Title

      Nano Letters

      Volume: 18 Issue: 11 Pages: 6789-6794

    • DOI

      10.1021/acs.nanolett.8b02647

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nonreciprocal charge transport in noncentrosymmetric superconductors2017

    • Author(s)
      Wakatsuki Ryohei、Saito Yu、Hoshino Shintaro、Itahashi Yuki M.、Ideue Toshiya、Ezawa Motohiko、Iwasa Yoshihiro、Nagaosa Naoto
    • Journal Title

      Science Advances

      Volume: 3 Issue: 4

    • DOI

      10.1126/sciadv.1602390

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bulk rectification effect in a polar semiconductor2017

    • Author(s)
      T. Ideue, K. Hamamoto, S. Koshikawa, M. Ezawa, S. Shimizu, Y. Kaneko, Y. Tokura, N. Nagaosa and Y. Iwasa
    • Journal Title

      Nature Communications

      Volume: online Issue: 6 Pages: 1-7

    • DOI

      10.1038/nphys4056

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Giant thermal Hall eect in multiferroics2017

    • Author(s)
      T. Ideue, T. Kurumaji, S. Ishiwata, and Y. Tokura
    • Journal Title

      Nature Materials

      Volume: 16 Issue: 8 Pages: 797-802

    • DOI

      10.1038/nmat4905

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Exciton Hall effect in monolayer MoS22017

    • Author(s)
      M. Onga, Y. Zhang, T. Ideue, and Y. Iwasa
    • Journal Title

      Nature Materials

      Volume: 16 Issue: 12 Pages: 1193-1197

    • DOI

      10.1038/nmat4996

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Nonlinear transport in engineered van der Waals crystals2019

    • Author(s)
      井手上敏也
    • Organizer
      新学術領域研究「トポロジーが紡ぐ物質科学のフロンティア」第4回領域研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] ZrNCl電界誘起超伝導相における非相反超伝導輸送2019

    • Author(s)
      井手上敏也, 越川翔太, 板橋勇輝, 中川裕治, 岩佐義宏
    • Organizer
      日本物理学会 2019年 年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Nonreciprocal electrical transport in van der Waals crystals2019

    • Author(s)
      T. Ideue, Y. Iwasa
    • Organizer
      APS March Meeting 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nonreciprocal transport in noncentrosymmetric van der Waals crystals2019

    • Author(s)
      T. Ideue, Y. Iwasa
    • Organizer
      2nd International Workshop on 2D Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermal Hall effect in magnetic insulators2018

    • Author(s)
      Toshiya Ideue
    • Organizer
      The 16th International Conference on Phonon Scattering in Condensed Matter (Phonons 2018) & The 4th International Conference on Phononics and Thermal Energy Science (PTES2016)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 二次元遷移金属ダイカルコゲナイドにおけるスピン・バレー輸送2018

    • Author(s)
      井手上敏也, 岩佐義宏
    • Organizer
      第79回 応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Topological aspects of nonlinear transport in van der Waals crystals2018

    • Author(s)
      Toshiya Ideue
    • Organizer
      The 2nd TMS-PKU Alliance Workshop on Topological Materials and Quantum Materials, International Center For Quantum Material
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Emergent optical responses in transition metal dichalcogenides nanocrystals2018

    • Author(s)
      Toshiya Ideue
    • Organizer
      EMN Meeting on Photonics 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 空間反転対称性の破れたPbTaSe2における非相反超伝導輸送2018

    • Author(s)
      井手上敏也, 越川翔太, 並木宏允, 笹川崇男, 岩佐義宏
    • Organizer
      日本物理学会 2018年 秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Nonreciprocal charge transport in a polar van der Waals crystal BiTeBr2018

    • Author(s)
      T. Ideue, Koshikawa, K. Hamamoto, M. Ezawa, Y. Kaneko, S. Shimizu, Y. Tokura, N. Nagaosa, Y. Iwasa
    • Organizer
      First International Workshop on 2D Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Topological phase transition in non-centrosymmetric semiconductor Te under pressure2018

    • Author(s)
      T. Ideue, M. Hirayama, H. Taiko, T. Takahashi, M. Murase, T. Miyake, S. Murakami, T. Sasagawa, and Y. Iwasa
    • Organizer
      APS March Meeting 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nonreciprocal Electric Transport In Chiral And Polar Nanomaterials2017

    • Author(s)
      T. Ideue
    • Organizer
      The 2nd International Nanotechnology Conference & Expo
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Superconductivity in noncentrosymmteric low-dimensional materials2017

    • Author(s)
      T. Ideue
    • Organizer
      Superstripes 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Superconductivity in chiral tungsten disulfide nanotube2017

    • Author(s)
      T. Ideue
    • Organizer
      GSS17: 8th Graphene and 2D Materials Satellite Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 単結晶テルルにおける圧力下輸送特性2017

    • Author(s)
      井手上敏也, 太向弘明, 高橋敬成, 村瀬正恭, 笹川崇男, 岩佐義宏
    • Organizer
      日本物理学会 2017年秋季大会参加
    • Related Report
      2017 Research-status Report
  • [Presentation] Nonreciprocal Electric Transport in Noncentrosymmetric Nanomaterials2017

    • Author(s)
      T. Ideue
    • Organizer
      Nano S&T-2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Nonlinear superconducting transport in noncentrosymmetric superconductors2017

    • Author(s)
      T. Ideue
    • Organizer
      ISS2017 30th International Symposium on Superconductivity
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 固体中で光の情報を制御する新現象を発見 ―光デバイスの多機能化に期待―

    • URL

      http://www.t.u-tokyo.ac.jp/shared/press/data/setnws_201710031308235295448892_590530.pdf

    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-07-21   Modified: 2023-04-13  

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