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Investigation on novel quantum phases appeared between itinerant and localized regions in multi-orbital electron systems

Research Project

Project/Area Number 16H04012
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionNagoya University

Principal Investigator

Itoh Masayuki  名古屋大学, 理学研究科, 教授 (90176363)

Co-Investigator(Kenkyū-buntansha) 小林 義明  名古屋大学, 理学研究科, 准教授 (60262846)
清水 康弘  名古屋大学, 理学研究科, 講師 (00415184)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Keywords強相関電子系 / 多軌道電子系 / 新奇量子相 / 鉄系超伝導体 / キタエフ・スピン液体 / 軌道縮退系 / 励起子絶縁体 / 核磁気共鳴 / スピン軌道相互作用 / 高圧核磁気共鳴実験 / ネマティック揺らぎ / ネマティック秩序 / レニウム酸化物 / 磁性 / 超伝導 / 低温物性 / 物性実験 / 多軌道系 / 核磁気共鳴法 / スピンクロスオーバー / ポーラロン / スピン液体 / キタエフモデル / 軌道縮退 / 磁気八極子 / 擬ギャップ / 強磁性半金属 / 低温実験
Outline of Final Research Achievements

Strongly correlated multi-orbital d electron systems between itinerant and localized regions show novel quantum phenomena due to the multi-orbital effect. In this study we have performed characteristic nuclear magnetic resonace (NMR) experiments such as orbital-resolved NMR to understand the phenomena of the strongly correlated electron systems. We obtained interesting results of electronic phase diagram of a superconducting system, charge order in a one-dimensional conductor, nematic order and fluctuation in iron-based superconductors, electronic states of a spin-crossover material, hidden order in a degenerated electron system, magnetic excitations in a candidate of the Kitaev spin liquid, and high-pressure properties of an excitonic-insulator candidate.

Academic Significance and Societal Importance of the Research Achievements

固体物理学の分野では、物性開拓と物質探索が分野の発展を牽引してきた。その中で、新奇物性の発現機構を解明することが、新たな発展には重要である。本研究では、新奇物性が数多く現れる物質群である多軌道強相関電子系を対象にし、従来理解されていなかった物性発現機構に対して光をあてることができた。本研究で得られた成果は、この分野の進展に寄与するとともに、将来、応用分野の基礎研究としても生かさられる可能性を持っている。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (51 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (7 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (40 results) (of which Int'l Joint Research: 6 results) Remarks (1 results)

  • [Int'l Joint Research] 國立中山大学(台湾)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] マックスプランク固体物理学研究所(ドイツ)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] 國立中山大学(台湾)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] In-plane anisotropy of the electric field gradient in Ba(Fe1-xCox)2As2 observed by 75As NMR2018

    • Author(s)
      Masayuki Toyoda, Akihiro Ichikawa, Yoshiaki Kobayashi, Masatoshi Sato, and Masayuki Itoh
    • Journal Title

      Phys. Rev. B

      Volume: 97 Issue: 17

    • DOI

      10.1103/physrevb.97.174507

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Local structure study of the iron-based systems of BaFe2As2 and LiFeAs by X-ray PDF and XAFS analyses2018

    • Author(s)
      S. Li, M. Toyoda, Y. Kobayashi, M. Itoh, K. Ikeuchi, Y. Yoneda, A. Otani, D. Matsumura, S. Asano, J. Mizuki, and M. Sato
    • Journal Title

      Physica C: Superconductivity and its applications

      Volume: 555 Pages: 45-53

    • DOI

      10.1016/j.physc.2018.10.003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nematic fluctuations in iron arsenides NaFeAs and LiFeAs probed by 75As NMR2018

    • Author(s)
      M. Toyoda, Y. Kobayashi, and M. Itoh
    • Journal Title

      Phys. Rev. B

      Volume: 97 Issue: 9

    • DOI

      10.1103/physrevb.97.094515

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Local magnetic susceptibility, spin dynamics, and charge order in the quasi-one-dimensional conductor β-Li0.33V2O5 investigated by site-selective V51 NMR2017

    • Author(s)
      Yamauchi Ichihiro、Itoh Masayuki、Yamauchi Touru、Yamaura Jun-Ichi、Ueda Yutaka
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 20 Pages: 205114-205114

    • DOI

      10.1103/physrevb.96.205114

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Trimerization and orbital ordering in Ba1-xSxV13O182017

    • Author(s)
      T. Kajita, Y. Obata, Y. Kakesu, Y. Imai, Y. Shmizu, M. Itoh, H. Kuwahara, T. Katsufuji
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 24 Pages: 245126-245126

    • DOI

      10.1103/physrevb.96.245126

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Symmetry Preservation and Critical Fluctuations in a Pseudospin Crossover Perovskite LaCoO32017

    • Author(s)
      Y. Shimizu, T. Takahashi, S. Yamada, A. Shimokata, T. Jin-no, M. Itoh
    • Journal Title

      Physical Review Letters

      Volume: 119 Issue: 26

    • DOI

      10.1103/physrevlett.119.267203

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Metal-insulator transition and magnetic fluctuations in polycrystalline Ru1-xRhxP investigated by 31P NMR2017

    • Author(s)
      S. Li, Y. Kobayashi, M. Itoh, D. Hirai, and H. Takagi
    • Journal Title

      Phys. Rev. B

      Volume: 95 Issue: 15

    • DOI

      10.1103/physrevb.95.155137

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 77Se-NMRから見た鉄系超伝導体FeSeの圧力による電子状態の変化2019

    • Author(s)
      小林大将, 小林義明, 伊藤正行
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 77Se-NMRからみた励起子絶縁体候補物質Ta2NiSe5の高圧下電子状態2019

    • Author(s)
      河合俊輔, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 励起子絶縁体候補物質TiSe2単結晶の77Se-NMR2019

    • Author(s)
      山本裕介, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Sr7Re4O19における新奇な相転移2019

    • Author(s)
      上田寛, 村瀬美奈, 小林義明, 伊藤正行, 矢島健
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Quantum criticality of Kitaev spin liquid2018

    • Author(s)
      Y. Shimizu, Y. Nagai, M. Itoh, J. Yoshitake, J. Nasu, and Y. Motome
    • Organizer
      International Conference on Highly Frustrated Magnetism 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exciton condensation in excitonic insulators investigated by NMR2018

    • Author(s)
      S. Li, S. Kawai, Y. Yamamoto, Y. Kobayashi, and M. Itoh
    • Organizer
      International Conference on Magnetism 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nematic fluctuations in iron arsenide superconducting system probed by 75As NMR2018

    • Author(s)
      Y. Kobayashi, M. Toyoda, and M. Itoh
    • Organizer
      International Conference on Magnetism 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NMRから見た鉄系超伝導体Ba(Fe1-xCox)2As2、NaFeAs、LiFeAsのネマチック状態2018

    • Author(s)
      小林義明, 豊田真幸, 伊藤正行
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 鉄系超伝導体FeSeの圧力下におけるNMR2018

    • Author(s)
      小林大将, 小林義明, 伊藤正行
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] レニウム化合物における新奇磁性の探求2018

    • Author(s)
      村瀬美奈, 小林義明, 伊藤正行, 上田寛
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 77Se-NMRから見た励起子絶縁体候補物質TiSe2の磁性、局所構造(II)2018

    • Author(s)
      山本裕介, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 励起子絶縁体候補物質Ta2NiSe5の圧力下における77Se-NMRによる研究2018

    • Author(s)
      河合俊輔, 小林義明, 清水康弘, 伊藤正行
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 擬三角格子系SrV13O18の異常金属状態における局所磁性2018

    • Author(s)
      今井祐太, 清水康弘, 伊藤正行, 梶田倫正, 勝藤拓郎
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] La1-xSrxCoO3におけるスピンポーラロンの微視的観測2018

    • Author(s)
      佐野裕明, 清水康弘, 小林義明, 伊藤正行
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Kitaev型ハニカム格子反強磁性体α-RuCl3におけるNMR2017

    • Author(s)
      長井優弥, 清水康弘, 伊藤正行, 吉竹純基, 那須譲治, 求幸年
    • 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
    • Related Report
      2016 Annual Research Report
  • [Presentation] スピネル型硫化物CuIr2S4のNMR2017

    • Author(s)
      今井祐太, 清水康弘, 伊藤正行
    • 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
    • Related Report
      2016 Annual Research Report
  • [Presentation] BaTi2As2Oの低温相における可能な結晶構造について2017

    • Author(s)
      稲冨健太, 小林義明, 伊藤正行
    • 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
    • Related Report
      2016 Annual Research Report
  • [Presentation] 軌道縮退系バナジウム酸化物α-Sr2VO4の磁性とその解析2017

    • Author(s)
      神野貴昭, 加藤優介, 清水康弘, 小林義明, 伊藤正行, 櫻井裕也, Ting-Hui Kao, 楊弘敦
    • 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
    • Related Report
      2016 Annual Research Report
  • [Presentation] RuP単結晶に対する31P-NMRによる研究2017

    • Author(s)
      李尚, 小林義明, 伊藤正行, 平井大悟郎, 広井善二, 高木英典
    • 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
    • Related Report
      2016 Annual Research Report
  • [Presentation] Aサイト秩序型ペロブスカイトLnCu3Cr4O12 (Ln=Ca, La, Bi)の低温電子状態2017

    • Author(s)
      小柳大樹, 小林義明, 伊藤正行, 磯部正彦, 高木英典, 桜井裕也
    • 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
    • Related Report
      2016 Annual Research Report
  • [Presentation] Low-temperature electronic state in the titanium-oxypnictide BaTi2As2O2017

    • Author(s)
      Y. Kobayashi, K. Inadomi, and M. Itoh
    • Organizer
      28th International Conference on Low Temperature Phyiscs
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetic properties of α-Sr2VO4 with degenerated orbitals studied by single-crystal 51V NMR2017

    • Author(s)
      Y. Kato, Y. Shimizu, Y. Kobayashi, M. Itoh, T. Jin-no, H. Sakurai, T. -H. Kao, H. -D. Yang
    • Organizer
      28th International Conference on Low Temperature Phyiscs
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 31P NMR study of a quantum spin system CuP2O6 with two-dimensional planes and one-dimensional chains2017

    • Author(s)
      H. Yamada, Y. Kobayashi, Y. Shimizu, M. Itoh, K.M. Ranjith, and R. Nat
    • Organizer
      28th International Conference on Low Temperature Phyiscs
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 軌道縮退系バナジウム酸化物α-Sr2VO4単結晶の角度制御51V-NMR2017

    • Author(s)
      加藤優介, 清水康弘, 小林義明, 伊藤正行, 神野貴昭, 櫻井裕也, 高莚, 楊弘敦
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] ハニカム格子反強磁性体α-RuCl3における磁場誘起相転移2017

    • Author(s)
      長井優弥, 清水康弘, 伊藤正行, 吉竹純基, 那須譲治, 求幸年
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] チタンオキソニクタイドBaTi2As2Oの結晶・電子構造について2017

    • Author(s)
      稲冨健太, 小林義明, 伊藤正行
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] LaCoO3の圧力印加およびSrドープによるスピン状態の微視的変化2017

    • Author(s)
      佐野裕明, 清水康弘, 小林義明, 伊藤正行
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] RuP単結晶の低温電子状態 31P-NMR2017

    • Author(s)
      李尚, 小林義明, 伊藤正行, 平井大悟郎, 広井善二, 高木英典
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Kitaev型ハニカム格子反強磁性体α-RuCl3における35Cl NMR2016

    • Author(s)
      長井優弥, 清水康弘, 伊藤正行, 吉竹純基, 那須譲治, 求幸年
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 様々な鉄系超伝導体における局所構造のFe面内対称性の破れについて2016

    • Author(s)
      豊田真幸, 小林義明, 伊藤正行, 佐藤正俊
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] LaCoO3のSrドープによるスピン状態の微視的変化2016

    • Author(s)
      佐野裕明, 清水康弘, 小林義明, 伊藤正行
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 擬三角格子系Ba1-xSrxV13O18の51V NMR2016

    • Author(s)
      今井祐太, 橋本侑弥, 清水康弘, 伊藤正行, 掛巣佑, 神埼達也, 勝藤拓郎
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] NMRで見たチタン酸化ニクタイド物質BaTi2As2Oの低温電子状態2016

    • Author(s)
      稲冨健太, 小林義明, 伊藤正行
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] LaCoO3における擬スピン状態と臨界ゆらぎ2016

    • Author(s)
      清水康弘, 神野貴昭, 伊藤正行
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] A-サイト秩序型ぺロブスカイト酸化物CaCu3Cr4O12の低温磁気秩序状態のNMRによる研究2016

    • Author(s)
      小柳大樹, 小林義明, 伊藤正行, 磯部正彦, 高木英典, 桜井裕也
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 75As NMR studies on the nematic state in the iron pnictide NaFeAs2016

    • Author(s)
      M. Toyoda, Y. Kobayashi, and M. Itoh
    • Organizer
      International Conference on Strongly Correlated Electron Systems 2016
    • Place of Presentation
      Zhejiang University, Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
  • [Presentation] NMR study on electronic and magnetic properties of Fe-based ladder compounds AFe2Se3 (A = Ba, Cs)2016

    • Author(s)
      K. Okada, Y. Kobayashi, M. Itoh, Y. Hirata, K. Hashizume, T. Aoyama, and K. Ohgushi
    • Organizer
      International Conference on Strongly Correlated Electron Systems 2016
    • Place of Presentation
      Zhejiang University, Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
  • [Presentation] Magnetic order and valence change in the A-site ordered perovskite Cr oxide CaCu3Cr4O12 probed by 63,65Cu NQR2016

    • Author(s)
      Y. Kobayashi, D. Koyanagi, M. Itoh, M. Isobe, H. Takagi, and H. Sakurai
    • Organizer
      International Conference on Strongly Correlated Electron Systems 2016
    • Place of Presentation
      Zhejiang University, Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
  • [Presentation] Magnetic fluctuations of Ru1-xRhxP investigated by 31P NMR2016

    • Author(s)
      S. Li, Y. Kobayashi, M. Itoh, D. Hirai, Z. Hiroi, and H. Takagi
    • Organizer
      International Conference on Strongly Correlated Electron Systems 2016
    • Place of Presentation
      Zhejiang University, Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
  • [Presentation] Orbital degenerated 3d1 system α-Sr2VO4 investigated by 51V NMR2016

    • Author(s)
      Y. Kato, Y. Shimizu, Y. Kobayashi, M. Itoh, H. Sakurai,Ting-Hui Kao, and Hung-Duen Yang
    • Organizer
      International Conference on Strongly Correlated Electron Systems 2016
    • Place of Presentation
      Zhejiang University, Hangzhou, China
    • Year and Date
      2016-05-08
    • Related Report
      2016 Annual Research Report
  • [Remarks] 名古屋大学大学院理学研究科物理学教室固体磁気共鳴研究室

    • URL

      http://i-ken.phys.nagoya-u.ac.jp/index_j.html

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report 2016 Annual Research Report

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Published: 2016-04-21   Modified: 2022-08-05  

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