Search for novel ordered states and anomalous response to the external field for quasi-triangular lattices

• Project/Area Number: 25287090
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Waseda University
• Principal Investigator: Katsufuji Takuro 早稲田大学, 理工学術院, 教授 (00272386)
• Co-Investigator(Kenkyū-buntansha): MORI Shigeo 大阪府立大学, 工学研究科, 教授 (20251613) ; 奥田 哲治 鹿児島大学, 工学部, 准教授 (20347082)
• Co-Investigator(Renkei-kenkyūsha): OKUDA Tetsuji 鹿児島大学, 理工学研究科, 准教授 (20347082)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2013: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
• Keywords: 軌道/電荷整列 / 遷移金属酸化物 / 熱電効果 / 光誘起効果 / 軌道整列 / 光学測定 / 光誘起ダイナミクス / 熱伝導 / 磁気伝導 / NMR / 電子相転移 / 単結晶 / 非線形伝導

Outline of Final Research Achievements

We found (1) the competition between a charge-ordered phase and a trimer phase and an anomalous metallic state with the heavy effective mass in Ba1-xSrxV13O18 and (2) the modulation of d electrons on the Ti 1D chain in BaxTi8O16, both of which are novel odered phases on quasi-trianglar lattices of tansition-metals. We also found that (c) the phoon thermal conductivity of various titanates and vanadates with quasi-triangular lattices exhibit a universal behavior above and below the orbital/charge ordering temperature and (d) the photoinduced dynaics of polarons in various titanates with quasi-triangular lattices strongly depends on the dimensionality of the electronic structures.

Research Products

• [Int'l Joint Research] University of Virginia/Oak Ridge National Laboratory(米国)
• [Int'l Joint Research] Helmholtz-Zentrum(ドイツ)
• [Journal Article] Orbital Glass State of the Nearly Metallic Spinel Cobalt Vanadate (2016)
  • Author(s): R. Koborinai, S. E. Dissanayake, Dissanayake, M. Reehuis, M. Matsuda, T. Kajita, H. Kuwahara, S.-H. Lee, and T. Katsufuji
  • Journal Title: Physical Review Letters Volume: 116 Issue: 3
  • DOI: 10.1103/physrevlett.116.037201
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Universal Behaviors of the Phonon Thermal Conductivity Associated with the Charge/Orbital Ordering in Transition-Metal Oxides (2016)
  • Author(s): T. Katsufuji, T. Okuda, T. Murata, T. Kanzaki, K. Takayama, and A. Kajita
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Issue: 1 Pages: 013703-013703
  • DOI: 10.7566/jpsj.85.013703
  • NAID: 40020699673
  • Peer Reviewed
• [Journal Article] Electronic Phase Transition in Hollandite Titanate BaxTi8O16+x (2015)
  • Author(s): R. Murata, T. Sato, T. Okuda, Y. Horibe, H. Tsukasaki, S. Mori, N. Yamaguchi, K. Sugimoto, S. Kawaguchi, M. Takata, and T. Katsufuji
  • Journal Title: Physical Review B Volume: 92 Issue: 22
  • DOI: 10.1103/physrevb.92.220408
  • Peer Reviewed
• [Journal Article] Coupling between Mott excitation and d－d transitions in CoV2O4 (2015)
  • Author(s): H. Nishihara, A. Furuhashi, N. Yamaguchi, R. Koborinai, and T. Katsufuji
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 14
  • DOI: 10.1103/physrevb.92.140401
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Long-time relaxation of the magnetization in a pure crystal magnet La5Mo4O16 (2015)
  • Author(s): T. Konishi, K. Kobayashi and T. Katsufuji
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 2
  • DOI: 10.1103/physrevb.92.020419
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Magnetoresistance in a doped Mott-Hubbard system: RTiO3 (2015)
  • Author(s): T. Ito, Y. Shimada, and T. Katsufuji
  • Journal Title: Phys. Rev. B Volume: 91 Issue: 2
  • DOI: 10.1103/physrevb.91.024411
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Comparative studies of the thermal conductivity of spinel oxides with orbital degrees of freedom (2014)
  • Author(s): Y. Ishitsuka, T. Ishikawa, R. Koborinai, T. Omura, and T. Katsufuji
  • Journal Title: Phys. Rev. B Volume: 90 Issue: 22
  • DOI: 10.1103/physrevb.90.224411
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anomalous metallic ground state in BaV13O18 (2014)
  • Author(s): T. Kanzaki, J. Fujioka, Y. Tokura, H. Kuwahara, T. Katsufuji
  • Journal Title: Physical Review B Volume: 89 Issue: 14
  • DOI: 10.1103/physrevb.89.140401
  • Peer Reviewed
• [Journal Article] Effect of Offstoichiometry on the Physical Properties of Sr2VO4 (2014)
  • Author(s): T. Ueno, J. Kim, M. Takata, and T. Katsufuji
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Issue: 3 Pages: 34708-34708
  • DOI: 10.7566/jpsj.83.034708
  • NAID: 210000133006
  • Peer Reviewed
• [Journal Article] Photoinduced dynamics of spinel MnV2O4 (2013)
  • Author(s): K. Takubo, Y. Onishi, A. Furuhashi, A. Nogami, and T. Katsufuji
  • Journal Title: Phys. Rev. B Volume: 88 Issue: 21 Pages: 214416-214416
  • DOI: 10.1103/physrevb.88.214416
  • Peer Reviewed
• [Journal Article] Photoinduced dynamics in spinel and pyrochlore vanadates as Mott-Hubbard insulators with magnetic ordering (2013)
  • Author(s): A. Furuhashi, H. Nishihara, K. Takubo, and T. Katsufuji
  • Journal Title: Phys. Rev. B Volume: 88 Issue: 6
  • DOI: 10.1103/physrevb.88.060410
  • Peer Reviewed
• [Journal Article] Electronic Phase Transition and an Anomalous Ordered Phase in Ba2Ti13O22 with 3d1 Ions on a Triangle-Based Lattice (2013)
  • Author(s): K. Takayama, T. Koyama, S. Mori, K. Kato, M. Takata, J. Fujioka, Y. Tokura, J. Miyazaki, and T. Katsufuji
  • Journal Title: Phys. Rev. Lett. Volume: 110 Issue: 19 Pages: 196405-196405
  • DOI: 10.1103/physrevlett.110.196405
  • Peer Reviewed
• [Presentation] Orbital and magnetic states in spinel CoV2O4 (2016)
  • Author(s): T. Katsufuji
  • Organizer: The 16-th Japan- Korea-Taiwan Workshop on Strongly Correlated Electron Systems
  • Place of Presentation: Tokyo
  • Year and Date: 2016-02-19
  • Int'l Joint Research / Invited
• [Presentation] Anomalous Magnetic and Transport Properties in a Layered Magnet: La5Mo4O16 (2015)
  • Author(s): T. Katsufuji
  • Organizer: The 15th Taiwan-Japan-Korea Symposium on Strongly Correlated Electron Systems
  • Place of Presentation: Hsinchu, Taiwan
  • Year and Date: 2015-03-27 – 2015-03-28
  • Invited
• [Presentation] Competing phases in BaV13O18 with V quasi-fcc lattice (2015)
  • Author(s): T. Katsufuji
  • Organizer: Study of Matter at Extreme Conditions 2015
  • Place of Presentation: Florida, USA
  • Year and Date: 2015-03-08 – 2015-03-15
  • Invited
• [Presentation] Photoinduced dynamics of spinel MnV2O4 as a spin-orbital coupled system (2014)
  • Author(s): T. Katsufuji
  • Organizer: 14th Korea-Japan-Taiwan Workshop on SCES
  • Place of Presentation: Muju, Korea
  • Invited
• [Presentation] Orbital ordering and trimerization in various vanadates with V ions on triangle-based lattices (2013)
  • Author(s): T. Katsufuji
  • Organizer: LPBMS2013
  • Place of Presentation: 筑波
• [Presentation] 遷移金属酸化物におけるt2g軌道の自由度がもたらす新奇物性 (2013)
  • Author(s): 勝藤拓郎
  • Organizer: 物性研究所短期研究会「強相関電子系における局所対称性の破れと量子物性」
  • Place of Presentation: 柏
  • Invited