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Creation of new electronic phase in thin film of complex iridium oxides using super lattice

Research Project

Project/Area Number 17K14335
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

Hiraoka Naoka  東京大学, 大学院理学系研究科(理学部), 助教 (40758827)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords強相関電子系 / ディラック電子系
Outline of Final Research Achievements

Ir of SrIrO3 and CaIrO3 film on SrTiO3(001) substrate was substituted by Sn to suppress band width and introduce inhomogeneity of potential. In SrIrO3, substitution yielded transition into magnetic insulator at low temperature. On the other hand, Sn substituted CaIrO3 already showed insulating behavior above magnetic transition temperature. We concluded that inhomogeneity is the direct cause of insulating behavior of Sn substituted CaIrO3 while it is not in Sn substituted SrIrO3.

Academic Significance and Societal Importance of the Research Achievements

磁性を担っている電子とディラック分散を担っている電子が共通であると知られている例は少ない。本研究では、その候補物質について、置換という摂動がどのような影響を与えるか一例を示した。電子の遍歴と局在、その制御の方法に関して、新たな知見を与えると考えられる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019 2018 2017

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Design of Opposed-Anvil-Type High-Pressure Cell for Precision Magnetometry and Its Application to Quantum Magnetism2021

    • Author(s)
      Naoka Hiraoka, Kelton Whiteaker, Marian Blankenhorn, Yoshiyuki Hayashi, Ryosuke Oka, Hidenori Takagi, Kentaro Kitagawa
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: -

    • NAID

      40022620448

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Contrasted Sn substitution effects on Dirac line node semimetals SrIrO3 and CaIrO32019

    • Author(s)
      M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Takagi
    • Journal Title

      APL Materials

      Volume: 7 Issue: 12 Pages: 121101-121101

    • DOI

      10.1063/1.5129235

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] SQUID磁気計用対向アンビル型高圧セルの装置および測定方法改良2020

    • Author(s)
      平岡奈緒香, 北川健太郎, 林義之, Kelton Whiteaker, Marian Blankenhorn, 高木英典
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ステップ基板を用いたペロブスカイト型Sr(Ir1-x,Snx)O3薄膜の配向制御と電気輸送特性2018

    • Author(s)
      根岸真通, 平岡奈緒香, 高木英典
    • Organizer
      日本物理学会2018年秋季大会, 同志社大学京田辺キャンパス(京都), 2018年9月9日
    • Related Report
      2018 Research-status Report
  • [Presentation] Phase control of Dirac node electrons in perovskite-type (Sr,Ca)IrO3 thin films2018

    • Author(s)
      M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi
    • Organizer
      Max Plank-UBC-UTokyo School - Elementary Excitations in Quantum Materials -
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phase control of Dirac node electrons in perovskite-type (Sr,Ca)IrO3 thin films2018

    • Author(s)
      M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi
    • Organizer
      The 18th Taiwan-Japan-Korea Symposium on Strongly Correlated Electron Systems (TJK18)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] ペロブスカイト型SrIr1-xSnxO3薄膜の電子状態と弱強磁性2018

    • Author(s)
      根岸真通, 平岡奈緒香, 高木英典
    • Organizer
      日本物理学会第73回年次大会, 東京理科大学野田キャンパス(千葉), 2018年3月23日.
    • Related Report
      2017 Research-status Report
  • [Presentation] ダブルペロブスカイト型La2MgRuO6 薄膜の成長条件と輸送特性2018

    • Author(s)
      山村凌平, 平岡奈緒香, 高木英典, 浜根大輔
    • Organizer
      日本物理学会第73回年次大会, 東京理科大学野田キャンパス(千葉), 2018年3月23日.
    • Related Report
      2017 Research-status Report
  • [Presentation] Electronic phase control of perovskite SrIrO3 with Dirac line nodes2017

    • Author(s)
      N. Hiraoka
    • Organizer
      Gordon Godfrey Workshop 2017 on Spins and Strong Electron Correlations
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Dirac Semimetal-Magnetic Insulator Transition in Perovskite AIr1-xSnxO3 Thin Films (A = Ca, Sr)2017

    • Author(s)
      M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi
    • Organizer
      Yamada Science Foundation Junjiro Kanamori Memorial International Symposium - New Horizon of Magnetism -
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] ペロブスカイト型AIr1-xSnxO3薄膜(A = Ca, Sr)の半金属‐磁性絶縁体転移2017

    • Author(s)
      根岸真通, 平岡奈緒香, 大隅寛幸, 高木英典
    • Organizer
      日本物理学会2017年秋季大会, 岩手大学上田キャンパス(岩手), 2017年9月23日.
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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