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Complex Electrons and Functional Materials Research Group
Hidenori TAKAGI
Group Director
Hidenori TAKAGI (D.Eng.)
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Research Areas

Complex electron systems are emerging as a new paradigm in materials physics and chemistry. In such systems, strongly correlated electrons in solids are combined with low dimensionality and/or geometrical frustrations, and produce a rich variety of electronic phases and functions. We will explore the novel properties and functions of complex electron systems, together with basic physics behind them. The playgrounds should be free from the existing boundary of materials, covering transition metal compounds, organic molecular solids, surfaces and interfaces.

Research Subject

  1. Theory of complex electron systems
  2. Design of new materials and functions in complex electron systems
  3. Advanced characterization probe for complex electron systems

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window

List of Selected Publications

  1. K. Ohgushi, A. Yamamoto, Y. Kiuchi, C. Ganguli, K. Matsubayashi, Y. Uwatoko, and H. Takagi,:
    "Superconducting Phase at 7.7 K in the HgxReO3 Compound with a Hexagonal Bronze Structure"
    Physical Review Letters 106, 017001 (2011)
  2. T. Hanaguri, S. Niitaka, K.Kuroki, and H. Takagi,:
    "Unconventional s-Wave Superconductivity in Fe(Se,Te)"
    Science 328, 474 (2010)
  3. T. Itou, A. Oyamada, S. Maegawa, and R. Kato,:
    "Instability of a quantum spin liquid in an organic triangular-lattice antiferromagnet"
    Nature Physics, 6, 673 (2010)
  4. M. Yamashita, N. Nakata, Y. Senshu, M. Nagata, H. M. Yamamoto, R. Kato, T. Shibauchi, and Y. Matsuda,:
    "Highly Mobile Gapless Excitations in a Two-Dimensional Candidate Quantum Spin Liquid"
    Science, 328, 1246 (2010)
  5. N. Tajima, S. Sugawara, R. Kato, Y. Nishio, and K. Kajita,:
    "Effect of the zero-mode Landau level on interlayer magnetoresistance in multilayer massless Dirac fermion systems"
    Physical Review Letters, 102, 176403, (2009)
  6. Y. Kawano, T. Uchida, and K. Ishibashi,:
    "Terahertz sensing with a carbon nanotube/ two-dimensional electron gas hybrid transistor"
    Applied Physics Letters. 95, 083123 (2009)
  7. S. Onoda and Y. Tanaka,:
    "Quantum melting of spin ice: emergent cooperative quadrupole and chirality"
    Physical Review Letters 105, 074201 (2010)
  8. M. Taguchi, A. Chainani, M. Matsunami, R. Eguchi, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, S. Tsuda, S. Watanabe, C.-T. Chen, Y. Senba, H. Ohashi, K. Fujiwara, Y. Nakamura, H. Takagi, and S. Shin,:
    "Anomalous State Sandwiched between Fermi Liquid and Charge Ordered Mott-Insulating Phases of Ti4O7"
    Physical Review Letters 104, 106401 (2010)
  9. P. A. Bhobe, A. Chainani, M. Taguchi, T. Takeuchi, R. Eguchi, M. Matsunami, K. Ishizaka, Y. Takata, M. Oura, Y. Senba, H. Ohashi, Y. Nishino, M. Yabashi, K. Tamasaku, T. Ishikawa, K. Takenaka, H. Takagi, and S. Shin,:
    "Evidence for a correlated insulator to antiferromagnetic metal transition in CrN"
    Physical Review Letters 104, 236404 (2010)
  10. H-J. Shin, J. Jung, K. Motobayashi, S. Yanagisawa, Y. Morikawa, Y. Kim, and M. Kawai,:
    "State-selective dissociation of a single water molecule on an ultrathin MgO film"
    Nature Materials 9 442 (2010)

Members

Principal Investigator

Hidenori TAKAGI
Group Director




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