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Functional Superstructure Team
Masashi KAWASAKI
Team Leader
Masashi KAWASAKI (D.Sci.)
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Research Areas

Artificial interfaces and superlattices are designed and constructed with an aid of cutting-edge thin film technology of transition-metal oxides having various ordered structures in charge, spin and orbital degrees of freedom of electrons. The responses of these superstructures are examined to such stimuli as magnetic field, electric field and photo irradiation to elucidate the cross correlated functionalities. These studies will enable us to create new kinds of devices such as switches, memories, photovoltaics, and sensors based on a novel concept of gigantic cross correlation effects.

Research Subject

  1. Oxide thin films
  2. Oxide heterojunctions
  3. Oxide superlattices
  4. Oxide phtonics

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window
  2. Cross-Correlated Materials Research Group PageNew Window
  3. The University of Tokyo_Kawasaki Laboratory PageNew Window
  4. The University of Tokyo_Quantum-Phase Electronics Center PageNew Window

Press release

July 09, 2010
Emergent resistance network suggests mechanism for colossal magnetoresistance

RIKEN RESEARCH

September 03,2010
Mapping state lines
A network of filamentary conducting paths is behind the transition between insulating and conducting states in complex oxides New Window

List of Selected Publications

  1. H. Y. Hwang, Y. Iwasa, M. Kawasaki, B. Keimer, N. Nagaosa, Y. Tokura,:
    "Emergent phenomena at oxide interfaces"
    Nature Mater., 11, 103 (2012)
  2. J. Fujioka, M. Nakamura, M. Kawasaki, Y. Tokura,:
    "Photocarrier collection from depletion layer of LaMnO3"
    J. Appl. Phys., 111, 016107 (2012)
  3. H. Wadati, J. Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, Y. Yamasaki, H. Nakao, Y. Murakami, M. Mochizuki, M. Nakamura, M. Kawasaki, Y. Tokura,:
    "Origin of the large polarization in multiferroic YMnO3 thin films revealed by soft- and hard-x-ray diffraction"
    Phys. Rev. Lett., 108, 047203 (2012)
  4. J. S. Lee, Y. Krockenberger, K. S. Takahashi, M. Kawasaki, Y. Tokura,:
    "Insulator-metal transition driven by change of doping and spin-orbit interaction in Sr2IrO4"
    Phys. Rev. B, 85, 035101 (2012)
  5. P. H. Xiang, S. Asanuma, H. Yamada, I. H. Inoue, H. Sato, H. Akoh, A. Sawa, K. Ueno, H. Yuan, H. Shimotani, M. Kawasaki, Y. Iwasa,:
    "Strain-mediated phase control and electrolyte-gating of electron-doped manganites"
    Adv. Mater., 23, 5822 (2011)
  6. K. Shibuya, D. Okuyama, R. Kumai, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Taguchi, T. Arima, M. Kawasaki, Y. Tokura,:
    "X-ray induced insulator-metal transition in a thin film of electron-doped VO2"
    Phys. Rev. B, 84, 165108 (2011)
  7. Y. Yamasaki, D. Okuyama, M. Nakamura, T. Arima, M. Kawasaki, Y. Tokura, T. Kimura, Y. Wakabayashi,:
    "Interfacial structure of manganite superlattice"
    J. Phys. Soc. Jpn., 80, 073601 (2011)
  8. Y. Krockenberger, J. S. Lee, D. Okuyama, H. Nakao, Y. Murakami, M. Kawasaki, Y. Tokura,:
    "Garnet superlattice as a transparent above-room-temperature polar magnet"
    Phys. Rev. B, 83, 214414 (2011)
  9. R. Shimano, Y. Ikebe, K. S. Takahashi, M. Kawasaki, N. Nagaosa Y. Tokura,:
    "Terahertz Faraday rotation induced by an anomalous Hall effect in the itinerant ferromagnet SrRuO3"
    Euro. Phys. Lett., 95, 17002 (2011)
  10. A. Radetinac, K.S. Takahashi, L. Alff, M. Kawasaki, Y. Tokura,:
    "Single-crystalline Sr2MoO4 films as prepared by pulsed laser deposition"
    J. Cryst. Growth, 322, 38-40 (2011)

Members

Principal Investigator

Masashi KAWASAKI
Team Leader

Staff Scientist

Kei TAKAHASHI
Deputy Team Leader
Masao NAKAMURA
ASI Research Scientist

Student Trainee

Masato ITO
Junior Research Associate
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