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2012 Fiscal Year Final Research Report

The study on the mechanism of ferromagnetic metal-insulator transition and novel quantum properties in chromium oxides

Research Project

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Project/Area Number 22244041
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

UEDA Yutaka  東京大学, 物性研究所, 教授 (20127054)

Co-Investigator(Renkei-kenkyūsha) UEDA Hiroaki  京都大学, 理学研究科, 准教授 (10373276)
ISOBE Masahiko  東京大学, 物性研究所, 技術専門職員 (70396919)
YAMAUCHI Toru  東京大学, 物性研究所, 技術専門職員 (10422445)
SHIN Shigi  東京大学, 物性研究所, 教授 (00162785)
FUJIWARA Naoki  京都大学, 人間環境学研究科, 准教授 (60272530)
OHTA Yukinori  千葉大学, 理学研究科, 教授 (70168954)
Project Period (FY) 2010 – 2012
Keywords強相関電子系 / 物性実験 / クロム酸化物 / 電磁気物性 / 金属絶縁体転移 / ホランダイト酸化物
Research Abstract

Detailed structure analysis by synchrotron x-ray diffraction experiments and the electronic structure calculations demonstrate that the novel ferromagnetic metal-insulator transition in K2Cr8O16 is caused by a Peierls instability in the quasi-one-dimensional column structure made of four coupled Cr-O chains running in the c direction, leading to the formation of tetramers of Cr ions below the transition temperature. This provides a rare example of the Peierls transition of fully spin-polarized electron systems.

  • Research Products

    (20 results)

All 2013 2012 2011 2010

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (10 results)

  • [Journal Article] Interlayer Switching of Reduction in Layered Oxide, Bi4V2O11-δ (0?δ?1)2013

    • Author(s)
      Y. Zhang and Y. Ueda
    • Journal Title

      Inorg. Chem

      Volume: 52 Pages: 5206-5213

    • DOI

      DOI:10.1021/ic400111w.

    • Peer Reviewed
  • [Journal Article] Synthesis, Structure and Electromagnetic Properties of Manganese Hollandite, KxMn8O162012

    • Author(s)
      T. Kuwabara, M. Isobe, H. Gotou, T. Yagi, D. Nishio-Hamane, and Y. Ueda
    • Journal Title

      J. Phys. Soc. Jpn

      Volume: 81 Pages: 104701/1-5

    • DOI

      DOI:10.1143/JPSJ.81.104701.

    • Peer Reviewed
  • [Journal Article] μ+SR study on ferromagnetic hollandites, K2Cr8O16 and Rb2Cr8O162012

    • Author(s)
      J. Sugiyama, H. Nozaki . M. Mansson, K. Pr?a, D. Andreica, A. Amato, M. Isobe, and Y. Ueda
    • Journal Title

      Phys. Rev. B

      Volume: 85 Pages: 214407/1-8

    • Peer Reviewed
  • [Journal Article] Infrared phonons and specific heat in the gapped quantum magnet Ba3Cr2O82012

    • Author(s)
      Z. Wang, M. Schmidt, A. Gunther, F. Mayr, Y. Wan, S.-H. Lee, H. Ueda, Y. Ueda, A. Loidl, and J. Deisenhofer
    • Journal Title

      Phys. Rev. B

      Volume: 85 Pages: 224304/1-5

    • DOI

      DOI:10.1103/PhysRevB.85.224304.

    • Peer Reviewed
  • [Journal Article] Observation of Structural Change in the Novel Ferromagnetic Metal-Insulator Transition of K2Cr8O162012

    • Author(s)
      A. Nakao, Y. Yamaki, H. Nakao, Y. Murakami, K. Hasegawa, M. Isobe, and Y. Ueda
    • Journal Title

      J. Phys. Soc. Jpn

      Volume: 81 Pages: 054710/1-6

    • DOI

      DOI:10.1143/JPSJ.81.054710.

    • Peer Reviewed
  • [Journal Article] Peierls Mechanism of the Metal-Insulator Transition in Ferromagnetic Hollandite K2Cr8O162011

    • Author(s)
      T. Toriyama. A. Nakao, H. Nakao, Y. Murakami, K. Hasegawa, M. Isobe, Y. Ueda, A. V. Ushakov, D. I. Khomskii, S. V. Streltsov, T. Konishi, and Y. Ohta
    • Journal Title

      Phys. Rev. Lett.

      Volume: 107 Pages: 266402/1-5

    • DOI

      DOI:10.1103/PhysRevLett.107.266402.

    • Peer Reviewed
  • [Journal Article] Magnetic order, transport and infrared optical properties in the ACrO3 system (A = Ca, Sr, and Pb)2011

    • Author(s)
      A. C. Komarek, T. Moller, M. Isobe, Y. Drees, H. Ulbrich, M. Azuma, M. T. Fernandez-Diaz, A. Senyshyn, M. Hoelzel, G. Andre, Y. Ueda, M. Gruninger, and M. Braden
    • Journal Title

      Phys. Rev. B

      Volume: 84 Pages: 125114/1-14

    • DOI

      DOI:10.1103/PhysRevB.84.125114.

    • Peer Reviewed
  • [Journal Article] Electromagnetic properties of hollandite K2V8O16 under pressure2011

    • Author(s)
      T. Yamauchi, H. Ueda, M. Isobe, and Y. Ueda
    • Journal Title

      Phys. Rev. B

      Volume: 84 Pages: 115104/1-6

    • DOI

      DOI:10.1103/PhysRevB.84.115104.

    • Peer Reviewed
  • [Journal Article] Electronic structure of an antiferromagnetic metal: CaCrO32011

    • Author(s)
      P. A. Bhobe, A. Chainani, M. Taguchi, R. Eguchi, M. Matsunami, T. Ohtsuki, K. Ishizaka, M. Okawa, M. Oura, Y. Senba, H. Ohashi, M. Isobe, Y. Ueda, and S. Shin
    • Journal Title

      Phys. Rev. B

      Volume: 83 Pages: 165132/1-7

    • DOI

      DOI:10.1103/PhysRevB.83.165132.

    • Peer Reviewed
  • [Journal Article] Synthesis, structures and magnetic properties of pseudo-hollandite chromium sulfides2010

    • Author(s)
      S. Yamazaki and Y. Ueda
    • Journal Title

      J. Solid State Chem.

      Volume: 183 Pages: 1905-1911

    • DOI

      DOI:10.1016/j.jssc.2010.03.013.

    • Peer Reviewed
  • [Presentation] Unusual bismuth and vanadium chemistry in a low dimensional oxide system2013

    • Author(s)
      Y. Zhang
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学東広島キャンパス(広島)
    • Year and Date
      2013-03-28
  • [Presentation] Hollandite K2Cr8O16: Crystal Growth under High Pressure and Ferromagnetic Metal-Insulator Transition2012

    • Author(s)
      Y. Ueda
    • Organizer
      Freiberg HighPressure Symposium 2012
    • Place of Presentation
      Freiberg, Germany
    • Year and Date
      2012-10-10
  • [Presentation] ホランダイト構造の強磁性体 K2Cr8O16 のμSR2012

    • Author(s)
      杉山純
    • Organizer
      日本物理学会 2012 秋季大会
    • Place of Presentation
      横浜国立大学常盤台キャンパス(横浜)
    • Year and Date
      2012-09-20
  • [Presentation] Novel Ferromagnetic Metal- Insulator Transition in K2Cr8O16 -Peierls Transition of Spinless Fermion-2012

    • Author(s)
      Y. Ueda
    • Organizer
      18th International Conference on Solid Compounds of Transition Elements, SCTE2012
    • Place of Presentation
      Lisbon, Portugal
    • Year and Date
      2012-04-05
  • [Presentation] Cr-Hollandite の圧力効果II2011

    • Author(s)
      山内徹
    • Organizer
      日本物理学会 2011 年秋季大会
    • Place of Presentation
      富山大学五福キャンパス(富山)
    • Year and Date
      2011-09-23
  • [Presentation] クロムホランダイトの強磁性金 属絶縁体転移における構造変化と相転移機構2011

    • Author(s)
      上田寛
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      富山大学五福キャンパス(富山)
    • Year and Date
      2011-09-23
  • [Presentation] K2M8O16 (M = Ti, V, Cr, Mn) ? a novel class of oxides with unusual properties -2011

    • Author(s)
      Y. Ueda, Hollandites
    • Organizer
      Tokyo-Cologne Workshop on Strongly Correlated Transition-Metal Compounds,
    • Place of Presentation
      Cologne, Germany
    • Year and Date
      2011-09-09
  • [Presentation] Electronic States of Half-Metallic Chromium Oxides Proved by 53Cr NMR2011

    • Author(s)
      H. Takeda
    • Organizer
      26th International Conference on Low Temperature Physics
    • Place of Presentation
      Beijing, China
    • Year and Date
      2011-08-14
  • [Presentation] Ferromagnetic and Metal-Insulator Transitions in Chromium Hollandite2011

    • Author(s)
      Y. Ueda
    • Organizer
      Advances in Applied Physics & Materials Science Congress
    • Place of Presentation
      Antalya, Turkey
    • Year and Date
      2011-05-13
  • [Presentation] Hidden frustration behind the unique ferromagnetic metal-insulator transition of K2Cr8O162011

    • Author(s)
      M. Isobe
    • Organizer
      International Conference on Frustration in Condensed Matter (ICFCM)
    • Place of Presentation
      Sendai, Japan
    • Year and Date
      2011-01-13

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Published: 2014-08-29  

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