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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. M. Nakamura, Y. Tokunaga, M. Kawasaki, Y. Tokura,:
    "Multiferroicity in an orthorhombic YMnO3 single-crystal film"
    Appl. Phys. Lett. 98, 082902 (2011)
  2. K. S. Takahashi, J. Fujioka, Y. Ida, M. Kawasaki, Y. Tokura,:
    "Control of orbital ordered state in strained Nd0.25Sr1.75MnO4 films "
    Appl. Phys. Lett. 96, 202508 (2010)
  3. K. Lai, M. Nakamura, W. Kundhikanjana, M. Kawasaki, Y. Tokura, M. A. Kelly, Z. X. Shen,:
    "Mesoscopic percolating resistance network in a strained manganite thin film"
    Science 329, 190 (2010)
  4. M. Nakamura, D. Okuyama, J.S. Lee, T. Arima, Y. Wakabayashi, R. Kumai, M. Kawasaki, Y. Tokura,:
    "Magnetically tubnable metal-insulator superlattices,"
    Adv. Mater. 22, 500 (2010)
  5. M. Nakamura, A. Sawa, J. Fujioka, M. Kawasaki, Y. Tokura,:
    "Interface band profiles of Mott-insulator/Nb:SrTiO3 heterojunctions as investigated by optical spectroscopy "
    Phys. Rev. B 82, 201101 (2010)
  6. J. S. Lee, M. Nakamura, D. Okuyama, R. Kumai, T. Arima, M. Kawasaki, Y. Tokura,:
    "Competing electronic orders in anisotropically strained (Pr0.6Ca0.4)1-x(La0.6Sr0.4)xMnO3 thin films"
    Phys. Rev. B 82, 052406 (2010)
  7. K. Shibuya, M. Kawasaki, Y. Tokura,:
    "Metal-insulator transitions in TiO2/VO2 superlattices "
    Phys. Rev. B 82, 205118 (2010), Editor's Suggetion
  8. Y. Krockenberger, M. Uchida, K. S. Takahashi, M. Nakamura, M. Kawasaki, Y. Tokura,:
    "Growth of superconducting Sr2RuO4 thin films "
    Appl. Phys. Lett. 97, 082502 (2010)
  9. K. Shibuya, M. Kawasaki, Y. Tokura,:
    "Metal-insulator transition in epitaxial V1-xWxO2 (0≤x≤0.33) thin films"
    Appl. Phys. Lett. 96, 022102 (2010)
  10. K. S. Takahashi, M. Onoda, M. Kawasaki, N. Nagaosa, Y. Tokura,:
    "Control of the anomalous Hall effect by doping in Eu1-xLaxTiO3 thin films,"
    Phys. Rev. Lett. 103, 057204 (2009)
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