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Correlated Electron Research Group
Yoshinori TOKURA
Group Director
Yoshinori TOKURA (D.Eng.)
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Research Areas

It has turned out during the last two decades that a large number of strongly interacting electrons in solids exhibit emergence of various surprising properties/functions, such as high-Tc superconductivity, colossal magnetoresistance, multiferroics, and quantum spin Hall effect, which cannot be understood within the framework of conventional semiconductor/metal physics. Our research group aim at obtaining the emergence of unprecedented and innovative electronic properties/functions, such as highly efficient energy conversion and dissipationless control of quantum state (information), by fully exploiting the complex interplay among multi-degrees of freedom of strongly correlated electrons as well as non-locality/stiffness/sensitivity characteristic of a "wave" in a well-designed "space-time structure that electrons experience".

Research Subject

  1. Basis of Mottronics
  2. Emergent properties of correlated electrons
  3. Principles of dissipationless electronics

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window
  2. Individual Website Laboratory PageNew Window
  3. Quantum Science on Strong Correlation PageNew Window

RIKEN RESEARCH

December 22,2011
Applying pressure reaps material rewards
A high-pressure growth technique creates single magneto-electric crystals useful for future generations of electronic memoryNew Window
October 14,2011
Splitting spin to get ahead
A bismuth-based semiconducting material could enable control of electron spin, a crucial requirement for advancing novel devicesNew Window
February 10, 2011
The physics of a sustainable society revolutionNew 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, 103-113 (2012)
  2. Y. Takahashi, R. Shimano, Y. Kaneko, H. Murakawa, and Y. Tokura.:
    "Magnetoelectric resonance with electromagnons in a perovskite helimagnet"
    Nature Physics 8, 121 (2012)
  3. D. Xiao, W.G. Zhu, Y. Ran, N. Nagaosa, and S. Okamoto.:
    "Interface engineering of quantum Hall effects in digital transition metal oxide heterostructures"
    Nature Communications 2, 596 (2011)
  4. H. Sakai, J. Fujioka, T. Fukuda, D. Okuyama, D. Hashizume, F. Kagawa, H. Nakao, Y. Murakami, T. Arima, A. Q. R. Baron, Y. Taguchi, and Y. Tokura.:
    "Displacement-Type Ferroelectricity with Off-Center Magnetic Ions in Perovskite Sr1-xBaxMnO3"
    Phys. Rev. Lett. 107, 137601 (2011)
  5. K. Ishizaka, M. S. Bahramy, H. Murakawa, M. Sakano, T. Shimojima, T. Sonobe, K. Koizumi, S. Shin, H. Miyahara, A. Kimura, K. Miyamoto, T. Okuda, H. Namatame, M. Taniguchi, R. Arita, N. Nagaosa, K. Kobayashi, Y. Murakami, R. Kumai, Y. Kaneko, Y. Onose, and Y. Tokura.:
    "Giant Rashba-type spin splitting in bulk BiTeI"
    Nature Materials Vol. 10, 521-526 (2011)
  6. Yu, X. Z., Kanazawa, N., Onose, Y., Kimoto, K., Zhang, W. Z., Ishiwata, S., Matsui, Y., and Tokura, Y.:
    "Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe"
    Nature Materials, Vol. 10, 106-109 (2011)
  7. Y. Onose, T. Ideue, H. Katsura, Y. Shiomi, N. Nagaosa, Y. Tokura.:
    "Observation of the Magnon Hall Effect"
    Science, Vol. 329, 297-299 (2010)
  8. X. Z. Yu,Y. Onose,N. Kanazawa,J. H. Park,J. H. Han,Y. Matsui,N. Nagaosa, and Y. Tokura.:
    "Real-space observation of a two-dimensional skyrmion crystal"
    Nature, Vol. 465, 901-904 (2010)
  9. Nakamura, M., Okuyama, D., Lee, J. S., Arima, T., Wakabayashi, Y., Kumai, R., Kawasaki, M., and Tokura, Y.:
    "Magnetically tunable metal-insulator superlattics."
    Adv. Mater. 22, 876 (2010)
  10. Y. Tokunaga, N Furukawa, H. Sakai, Y. Taguchi, T. Arima, and Y. Tokura.:
    "Composite domain walls in a multiferroic perovskite ferrite"
    Nature Materials, Vol.8, 558-562 (2009)

Members

Principal Investigator

Yoshinori TOKURA
Group Director

Staff Scientist

Izumi HIRABAYASHI
Deputy Group Director




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