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

2012 Fiscal Year Final Research Report

• Project/Area Number: 22244041
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: The 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

• [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, KxMn8O16 (2012)
  • 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 Rb2Cr8O16 (2012)
  • 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 Ba3Cr2O8 (2012)
  • 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 K2Cr8O16 (2012)
  • 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 K2Cr8O16 (2011)
  • 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 pressure (2011)
  • 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: CaCrO3 (2011)
  • 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 sulfides (2010)
  • 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 system (2013)
  • 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 Transition (2012)
  • 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μSR (2012)
  • 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II (2011)
  • 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 NMR (2011)
  • 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 Hollandite (2011)
  • 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 K2Cr8O16 (2011)
  • Author(s): M. Isobe
  • Organizer: International Conference on Frustration in Condensed Matter (ICFCM)
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2011-01-13