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2018 Fiscal Year Research-status Report

空間群の対称性や電子数に基づいたトポロジカル半金属や量子スピン液体の一般的理解

Research Project

Project/Area Number 17K17678
Research InstitutionThe University of Tokyo

Principal Investigator

渡辺 悠樹  東京大学, 大学院工学系研究科(工学部), 准教授 (20785323)

Project Period (FY) 2017-04-01 – 2020-03-31
Keywordsトポロジカル相
Outline of Annual Research Achievements

研究計画どおりに研究を遂行し、計画以上の成果を出し、論文もプレプリントを含め10報発表した。対称性指標の理論を発展させるだけでなく、高次トポロジカル絶縁体、フォトニックバンド構造におけるトポロジー、相互作用系におけるフラジャイルトポロジーといった新しいクラスのトポロジカル相についても本質的な進展があった。
アジア・欧米などで行われた国際会議・研究会で7件の招待講演を行なった。さらに東大本郷キャンパスでは自ら国際研究会をオーガナイズし研究のさらなる加速を目指した。

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

研究計画に記入した課題は実行できており、そこから派生する発展的な研究でも成果が出ているため。

Strategy for Future Research Activity

研究計画に従いこれまでどおり積極的な研究を行う。

Causes of Carryover

研究会参加のための別の予算が確保できたため

  • Research Products

    (15 results)

All 2019 2018

All Journal Article (8 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 8 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 7 results,  Invited: 7 results)

  • [Journal Article] Fragile topological phases in interacting systems2019

    • Author(s)
      Else Dominic V.、Po Hoi Chun、Watanabe Haruki
    • Journal Title

      Physical Review B

      Volume: 99 Pages: 125122

    • DOI

      10.1103/PhysRevB.99.125122

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inequivalent Berry Phases for the Bulk Polarization2018

    • Author(s)
      Watanabe Haruki、Oshikawa Masaki
    • Journal Title

      Physical Review X

      Volume: 8 Pages: 021065

    • DOI

      10.1103/PhysRevX.8.021065

    • Peer Reviewed / Open Access
  • [Journal Article] Symmetry Indicators and Anomalous Surface States of Topological Crystalline Insulators2018

    • Author(s)
      Khalaf Eslam、Po Hoi Chun、Vishwanath Ashvin、Watanabe Haruki
    • Journal Title

      Physical Review X

      Volume: 8 Pages: 031070

    • DOI

      10.1103/PhysRevX.8.031070

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fragile Topology and Wannier Obstructions2018

    • Author(s)
      Po Hoi Chun、Watanabe Haruki、Vishwanath Ashvin
    • Journal Title

      Physical Review Letters

      Volume: 121 Pages: 126402

    • DOI

      10.1103/PhysRevLett.121.126402

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Structure and topology of band structures in the 1651 magnetic space groups2018

    • Author(s)
      Watanabe Haruki、Po Hoi Chun、Vishwanath Ashvin
    • Journal Title

      Science Advances

      Volume: 4 Pages: eaat8685

    • DOI

      10.1126/sciadv.aat8685

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Connecting higher-order topological insulators to lower-dimensional topological insulators2018

    • Author(s)
      Matsugatani Akishi、Watanabe Haruki
    • Journal Title

      Physical Review B

      Volume: 98 Pages: 205129

    • DOI

      10.1103/PhysRevB.98.205129

    • Peer Reviewed
  • [Journal Article] Space Group Theory of Photonic Bands2018

    • Author(s)
      Watanabe Haruki、Lu Ling
    • Journal Title

      Physical Review Letters

      Volume: 121 Pages: 263903

    • DOI

      10.1103/PhysRevLett.121.263903

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Unified understanding of symmetry indicators for all internal symmetry classes2018

    • Author(s)
      Ono Seishiro、Watanabe Haruki
    • Journal Title

      Physical Review B

      Volume: 98 Pages: 115150

    • DOI

      10.1103/PhysRevB.98.115150

    • Peer Reviewed
  • [Presentation] Symmetry indicators of band topology I,II,III.2019

    • Author(s)
      Haruki Watanabe
    • Organizer
      Theoretical studies of topological phases of matter
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-Based Indicator and Fragile Topology with/without Interactions2018

    • Author(s)
      Haruki Watanabe
    • Organizer
      Workshop on Recent Developments in Chiral Matter and Topology
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-Based Indicator and Fragile Topology with/without Interactions2018

    • Author(s)
      Haruki Watanabe
    • Organizer
      Topological Phases and Excitations of Quantum Matter
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-based Indicators for higher-order topological insulators2018

    • Author(s)
      Haruki Watanabe
    • Organizer
      Topological Phases with Higher-Order Boundary States
    • Int'l Joint Research / Invited
  • [Presentation] Many-body polarization and Thouless pump via twisted boundary condition2018

    • Author(s)
      Haruki Watanabe
    • Organizer
      Topological Phases of Matter: from the Quantum Hall Effect to Spin Liquids
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-based Indicators of Topology2018

    • Author(s)
      Haruki Watanabe
    • Organizer
      New Paradigms in Quantum Matter 2018
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-based Indicators of Topology2018

    • Author(s)
      Haruki Watanabe
    • Organizer
      Topology and Correlation
    • Int'l Joint Research / Invited

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Published: 2019-12-27  

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