Novel Phase Formation and Phase Transition due to Magnetic Competing Phenomena

2011 Fiscal Year Final Research Report

• Project/Area Number: 21684019
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: NAKATSUJI Satoru 東京大学, 物性研究所, 准教授 (70362431)
• Project Period (FY): 2009 – 2011
• Keywords: 量子液体 / 非フェルミ液体 / 超伝導 / スピン液体 / 軌道揺らぎ

Research Abstract

We have explored low temperature states of new materials to search for novel quantum phases and phase transitions due to quantum criticality and geometrical frustration, and have discovered novel phenomena such as a quantum criticality without tuning in a metal, an anomalous metal due to the Kondo effect using quadrupolar degree of freedom, a zero field spontaneous Hall effect in a spin liquid state, and spin-orbital short-range order on a disordered honeycomb lattice.

Research Products

• [Journal Article] Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice (2012)
  • Author(s): S. Nakatsuji, K. Kuga, K. Kimura, R. Satake, N. Katayama, E. Nishibori, H. Sawa, R. Ishii, M. Hagiwara, F. Bridges, T. U. Ito, W. Higemoto, Y. Karaki, M. Halim, A. A. Nugroho, J. A. Rodriguez-Rivera, M. A. Green and C. Broholm
  • Journal Title: Science Volume: 336 Pages: 559
  • DOI: DOI:10.1126/science.1212154
• [Journal Article] Strong valence fluctuation effects in SmTr_2Al_<20>(Tr=Ti, V, Cr) (2011)
  • Author(s): A. Sakai and S. Nakatsuji
  • Journal Title: Physical Review B Volume: 84 Pages: 201106(R)/1-5
  • DOI: DOI:10.1103/PhysRevB.84.201106
• [Journal Article] Anisotropic heavy-Fermi-liquid formation in valence-fluctuatingα-YbAlB_4 (2011)
  • Author(s): Y. Matsumoto, K. Kuga, T. Tomita, Y. Karaki, and S. Nakatsuji
  • Journal Title: Physical Review B Volume: Vol.84 Pages: 125126/1-7
  • DOI: DOI:10.1103/PhysRevB.84.125126
• [Journal Article] Magnetic properties of the quasi-two-dimensional antiferromagnet Ni_<0. 7> Al_2S_<3. 7> (2011)
  • Author(s): T. Higo, R. Ishii, M. C. Menard, J. Y. Chan, H. Yamaguchi, M. Hagiwara, and S. Nakatsuji
  • Journal Title: Physical Review B Volume: Vol.84 Pages: 054422/1-7
  • DOI: DOI:10.1103/PhysRevB.84.054422
• [Journal Article] Quantum critical Kondo quasiparticles probed by ESR inβ-YbAlB_4 (2011)
  • Author(s): L. M. Holanda, J. M. Vargas, W. Iwamoto, C. Rettori, S. Nakatsuji, K. Kuga, Z. Fisk, S. B. Oseroff and P. G. Pagliuso
  • Journal Title: Physical Review Letters Volume: Vol.107 Pages: 026402/1-4
  • DOI: DOI:10.1103/PhysRevLett.107.026402
• [Journal Article] Magnetic transition, long-range order, and moment fluctuations in the pyrochlore iridate Eu_2Ir_2O_7 (2011)
  • Author(s): S. Zhao, J. Mackie, D. MacLaughlin, O. Bernal, J. J. Ishikawa, Y. Ohta and S. Nakatsuji
  • Journal Title: Physical Review B Volume: Vol.83 Pages: 83180402/1-4
  • DOI: DOI:10.1103/PhysRevB.83.180402
• [Journal Article] Kondo Effects and Multipolar Order in the Cubic PrTr_2Al_<20>(Tr=Ti, V) (2011)
  • Author(s): A. Sakai and S. Nakatsuji
  • Journal Title: Journal of the Physical Society of Japan, Letter Volume: 80 Pages: 063701/1-4
  • DOI: DOI:10.1143/JPSJ.80.063701
• [Journal Article] Anisotropic Hysteretic Hall Effect and Magnetic Control of Chiral Domains in the Chiral Spin States of Pr_2Ir_2O_7 (2011)
  • Author(s): L. Balicas, S. Nakatsuji, Y. Machida and S. Onoda
  • Journal Title: Physical Review Letters Volume: 106 Pages: 217204/1-4
  • DOI: DOI:10.1103/PhysRevLett.106.217204
• [Journal Article] Quantum Criticality without Tuning in the Mixed Valence Compoundβ-YbAlB_4 (2011)
  • Author(s): Y. Matsumoto, S. Nakatsuji, K. Kuga, Y. Karaki, N. Horie, Y. Shimura, T. Sakakibara, A.
  • Journal Title: H. Nevidomskyy, P. Coleman Science Volume: 331 Pages: 316-319
  • DOI: DOI:10.1126/science.1197531
• [Journal Article] Successive phase transitions and phase diagrams for the quasi-two-dimensional easy-axis triangular antiferromagnet Rb_4Mn(MoO_4)_3 (2011)
  • Author(s): R. Ishii, S. Tanaka, K. Onuma, Y. Nambu, M. Tokunaga, T. Sakakibara, N. Kawashima, Y. Maeno, C. Broholm, D. P. Gautreaux, J. Y. Chan and S. Nakatsuji
  • Journal Title: Europhysics Letter Volume: 94 Pages: 17001/1-5
  • DOI: DOI:10.1209/0295-5075/94/17001
• [Journal Article] Time-reversal symmetry breaking and spontaneous Hall effect without magnetic dipole order (2010)
  • Author(s): Yo Machida, Satoru Nakatsuji, Shigeki Onoda, Takashi Tayama, Toshiro Sakakibara
  • Journal Title: Nature Volume: 463 Pages: 210-213
  • DOI: DOI:10.1038/nature08680
• [Journal Article] Novel Geometrical Frustration Effects in the Two-Dimensional Triangular-Lattice Antiferromagnet NiGa_2S_4 and Related Compounds (2010)
  • Author(s): Satoru Nakatsuji, Yusuke Nambu, and Shigeki Onoda
  • Journal Title: Journal of the Physical Society of Japan Volume: 79 Pages: 011003/1-16
  • DOI: DOI:10.1143/JPSJ.79.011003
• [Journal Article] Low-Dimensional Structure and Magnetism of the Quantum Antiferromagnet Rb_4Cu(MoO_4)_3 and the Structure of Rb_4Zn(MoO_4)_3 (2010)
  • Author(s): Rieko Ishii, Dixie Gautreaux, Keisuke Onuma, Yo Machida, Yoshiteru Maeno, Satoru Nakatsuji, and Julia Y. Chan
  • Journal Title: Journal of the American Chemical Society Volume: 132 Pages: 7055-7061
  • DOI: DOI:10.1021/ja100077v
• [Journal Article] Pressure Dependence of Electrical Transport in the Triangular Antiferromagnetic Insulators, FeGa_2S_4 and Fe_2Ga_2S_5 T (2009)
  • Author(s): Tomita, Y. Nambu, S. Nakatsuji, S. Koeda, M. Hedo and Y. Uwatoko
  • Journal Title: Journal of the Physical Society of Japan Volume: 78 Pages: 094603/1-4
  • DOI: DOI:10.1143/JPSJ.78.094603
• [Journal Article] Structural properties of the two-dimensional triangular antiferromagnet NiGa_2S_4 (2009)
  • Author(s): Y. Nambu, R. T. Macaluso, T. Higo, K. Ishida and S. Nakatsuji
  • Journal Title: Physical Review B Volume: 79 Pages: 214108/1-7
  • DOI: DOI:10.1103/PhysRevB.79.214108
• [Journal Article] Spin dependent impurity effects in the 2D frustrated magnetism of NiGa_2S_4 (2008)
  • Author(s): Y. Nambu, S. Nakatsuji, Y. Maeno, E. K. Okudzeto, and J. Y. Chan
  • Journal Title: Physical Review Letters Volume: 101 Pages: 207204/1-4
  • DOI: DOI:10.1103/PhysRevLett.101.207204
• [Presentation] Quantum criticality without tuning in the intermediate valence materialβ-YbAlB_4 (2011)
  • Author(s): S. Nakatsuji
  • Organizer: International Conference on Low Temperature Physics
  • Place of Presentation: Beijing, China
  • Year and Date: 20110800
• [Presentation] Plenary Talk" Novel Quantum Phases in 4f electron based Kondo Lattice Systems" (2011)
  • Author(s): S. Nakatsuji
  • Organizer: International Conference on Ultra Low Temperature Physics
  • Place of Presentation: Korea
  • Year and Date: 20110800
• [Presentation] Spin Liquids and Quantum Criticality in Itinerant Magnets (2011)
  • Author(s): S. Nakatsuji
  • Organizer: CNLS conference "Novel Phenomena in Frustrated Systems"
  • Place of Presentation: Santa Fe U S A
  • Year and Date: 20110500
• [Presentation] Time-reversal symmetry breaking and spontaneous Hall effect without magnetic dipole order in Pr_2Ir_2O_7 (2011)
  • Author(s): S. Nakatsuji
  • Organizer: American Physical Society March Meeting, Symposium on "Gapless Spin Liquids"
  • Place of Presentation: Denver, U S A
  • Year and Date: 2011-03-23
• [Presentation] Chiral Spin Liquid and Spontaneous Hall Effect in the Frustrated Magnet Pr_2Ir_2O_7 (2010)
  • Author(s): S. Nakatsuji
  • Organizer: International Conference "Physical Phenomena at High Magnetic Field VII
  • Place of Presentation: Florida, U. S. A
  • Year and Date: 20101200
• [Presentation] Frustrated Magnetism and Spontaneous Hall Effect in Pr_2Ir_2O_7 (2010)
  • Author(s): S. Nakatsuji
  • Organizer: Highly Frustrated Magnetism 2010
  • Place of Presentation: Baltimore, U. S. A
  • Year and Date: 20100800
• [Presentation] Quantum Criticality in the Valence Fluctuating Superconductorβ-YbAlB_4 (2010)
  • Author(s): S. Nakatsuji
  • Organizer: International Conference on Strongly Correlated Electron Systems
  • Place of Presentation: Santa Fe, U. S. A
  • Year and Date: 20100600
• [Presentation] Non-Fermi-Liquid and Superconducting Properties of Quantum Criticalβ-YbAlB_4 (2009)
  • Author(s): S. Nakatsuji
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: Tokyo
  • Year and Date: 20090900
• [Presentation] Non-Fermi-Liquid and Novel Phase Formation in.-YbAlB_4 and Pr_2Ir_2O_7 (2009)
  • Author(s): S. Nakatsuji
  • Organizer: International Conference on Quantum Criticality and Novel Phases
  • Place of Presentation: Dresden, Germany
  • Year and Date: 20090800
• [Presentation] Spin liquids, Quantum Criticality in Itinerant Magnets
  • Author(s): S. Nakatsuji
  • Organizer: Tokyo-Cologne Workshop on Strongly Correlated Transition Metal Compounds
  • Place of Presentation: Cologne, Germany
  • Year and Date: 00000900
• [Remarks]
  • URL: http://satoru.issp.u-tokyo.ac.jp/