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Strong-Correlation Materials Research Team
Yasujiro TAGUCHI
Team Leader
Yasujiro TAGUCHI (D.Eng.)
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Research Areas

Strong correlation of electrons in oxides often leads to an insulating state accompanied by charge ordering/localization, or an anomalous metallic state on the verge of transition to an insulator. In these systems, charge/spin/orbital degrees of freedom of electrons and lattice degree of freedom strongly couple with each other, producing various intriguing phenomena. Focusing on these strongly correlated electron systems, we aim to explore novel materials that exhibit magnetoelectric, thermoelectric, magenetocaloric response. In addition, we try to make these responses gigantic, and pursue the possibility of applying these materials to spintronics devices, thermoelectric power generator, and magnetic refrigeration technology.

Research Subject

  1. Exploration of gigantic magnetoelectric response and cross control
  2. Magnetotransport phenomena in non-trivial spin texture
  3. Charge-spin-orbital-lattice coupled system
  4. Exploration of novel thermoelectric materials
  5. Exploration of novel magnetocaloric materials

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window
  2. Correlated Electron Research Group PageNew Window
  3. Quantum Science on Strong Correlation PageNew Window

List of Selected Publications

  1. N. Kida, S. Kumakura, S. Ishiwata, Y. Taguchi, and Y. Tokura,:
    "Gigantic terahertz magnetochromism via electromagnons in the hexaferrite magnet Ba2Mg2Fe12O22"
    Physica Reivew B, Vol. 83, in press(2011)
  2. T. Suzuki, M. S. Bahramy, R. Arita, Y. Taguchi, and Y. Tokura,:
    "Doping control and thermoelectric properties of R1-xAxZnSbO(R=La, Ce; A=Ca, Sr)"
    Physica Reivew B, January, Vol. 83, 035204-1 -- 035204-7(2011)
  3. Y. Tokunaga, Y. Kaneko, D. Okuyama, S. Ishiwata, T. Arima, S. Wakimoto, K. Kakurai, Y. Taguchi, and Y. Tokura,:
    "Multiferroic M-type hexaferrites with a room-temperature conical state and magnetically controllable spin helicity"
    Physical Review Letters, December, Vol. 105, 257201-1 - 257201-4(2010)
  4. H. Sakai, S. Ishiwata, D. Okuyama, A. Nakao, H. Nakao, Y. Murakami, Y. Taguchi, and Y. Tokura,:
    "Electron doping in the cubic perovskite SrMnO3: Isotropic metal versus chainlike ordering of Jahn-Teller polarons"
    Physical Review B, November, Vol. 82, 180409(R)-1 - 180409 (R)-4(2010)
  5. S. Ishiwata, D. Okuyama, K. Kakurai, M. Nishi, Y. Taguchi, and Y. Tokura,:
    "Neutron diffraction studies on the multiferroic conical magnet Ba2Mg2Fe12O22"
    Physical Review B, May, Vol.81, 174418-1-174418-8(2010)

Members

Principal Investigator

Yasujiro TAGUCHI
Team Leader

Postdoctoral Fellow

Debraj CHOUDHURY
Postdoctoral Researcher

Technical Assistant

Akiko KIKKAWA
Technical Staff I
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