Centers & Labs

RIKEN Center for Emergent Matter Science

Strong Correlation Materials Research Team

Team Leader: Yasujiro Taguchi (D.Eng.)
Yasujiro  Taguchi(D.Eng.)

We aim to study strongly correlated electron systems, such as transition-metal alloys, oxides and chalcogenides that show gigantic cross-correlation response. Specifically, we try to explore new materials, including skyrmion-hosting materials, multiferroic, thermoelectric, and magnetocaloric materials, by using various materials synthesis techniques such as high pressure synthesis technique. Also, we focus on the correlation between the spin state and charge dynamics.

Main Research Field

Mathematical and physical sciences

Related Research Fields

Interdisciplinary science and engineering / Engineering


  • magnetism
  • multiferroics
  • skyrmion
  • thermoelectrics
  • magnetocalorics

Selected Publications

  1. Kriener, M., Nakajima, T., Kaneko, Y., Kikkawa, A., Hashizume, D., Kato, K., Takata, M., Arima, T., Tokura, Y., and Taguchi, Y.:
    "Enhanced ferromagnetic transition temperature induced by a microscopic structural rearrangement in the diluted magnetic semiconductor Ge1-xMnxTe",
    Phys. Rev. B 95, 224418 (2017).
  2. Shimano, S., Tokura, Y., and Taguchi, Y.:
    "Carrier density control and enhanced thermoelectric performance of Bi and Cu co-doped GeTe",
    APL Materials 5, 056103 (2017).
  3. Karube, K., White, J.S., Reynolds, N., Gavilano, J.L., Oike, H., Kikkawa, A., Kagawa, F., Tokunaga, Y., Rønnow, H.M., Tokura, Y., and Taguchi, Y.:
    "Robust metastable skyrmions and their triangular-square lattice-structural transition in a high-temperature chiral magnet",
    Nature Mater. 15, 1237 (2016).
  4. Kriener, M., Nakajima, T., Kaneko, Y., Kikkawa, A., Yu, X. Z., Endo, N., Kato, K., Takata, M., Arima, T., Tokura, Y., and Taguchi, Y.:
    "Heat-treatment-induced switching of magnetic states in the doped polar semiconductor Ge1-xMnxTe",
    Scientific Report .6, 25748 (2016).
  5. Suzuki, T., Kikkawa, A., Tokura, Y., and Taguchi, Y.:
    "Impact of electron doping on thermoelectric properties in filled skutterudite IrSb3",
    Phys. Rev. B 93, 155101 (2015)
  6. Tokunaga, Y., Yu, X.Z., White, J.S., Ronnow, H. M., Morikawa, D., Taguchi, Y., and Tokura Y.:
    "A new class of chiral materials hosting magnetic skyrmions beyond room temperature"
    Nature Communications 6, 7638 (2015)
  7. Kriener, M., Kikkawa, A., Suzuki, T., Akashi, R., Arita, R., Tokura, Y. and Taguchi, Y.:
    "Modification of the electronic structure and thermoelectric properties of hole-doped tungsten dichalcogenides"
    Phys. Rev. B 91, 075205 (2015)
  8. Tokunaga, Y., Taguchi, Y., Arima, T., and Tokura, Y.:
    "Magnetic biasing of a ferroelectric hysteresis loop in a multiferroic orthoferrite"
    Phys. Rev. Lett. 112, 037203 (2014)
  9. Choudhury, D., Suzuki, T., Tokura, Y., and Taguchi, Y.:
    "Tuning structural instability toward enhanced magnetocaloric effect around room temperature in MnCo1-xZnxGe"
    Scientific Reports 4, 7544-1 — 7544-6, (2014)
  10. Tokunaga, Y., Taguchi, Y., Arima, T., and Tokura, Y.:
    "Electric field induced generation and reversal of ferromagnetic moment in ferrites"
    Nature Physics 8, 838-844 (2012)

Lab Members

Principal Investigator

Yasujiro Taguchi
Team Leader

Core Members

Markus Wilhelm Bernhard Kriener
Research Scientist
Akiko Kikkawa
Technical Scientist
Kosuke Karube
Postdoctoral Researcher
Vilmos Kocsis
Postdoctoral Researcher
Yusuke Tokunaga
Visiting Scientist
Satoshi Shimano
Visiting Scientist
Andrey Nikolaenko
Visiting Scientist
Atsunori Doi
Visiting Technician

Contact information

Frontier Research Laboratory, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Tel: +81-(0)48-467-9612

Email: y-taguchi [at]

Related links

Recent research results

January 6, 2017: RIKEN RESEARCH
Sturdy skyrmions stack up