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RIKEN Center for Emergent Matter Science Dynamic Emergent Phenomena Research Team

Team Leader: Fumitaka Kagawa (Ph.D.)

Research Summary

Fumitaka Kagawa

Our research team explores dynamic phenomena exhibited by strongly correlated electron systems in both bulk specimen and device structures to construct a new principle in condensed matter science. In particular, we study external-field-driven dynamic phenomena exhibited by sub-micron-scale structures, such as topological spin textures and domain walls, using spectroscopy of dielectric responses and resistance fluctuations from the millihertz to gigahertz region. We also pursue real-space observations and measurements of local physical properties using scanning probe microscopy as a complementary approach. We are aiming to control novel physical properties exhibited by topological structures in condensed matter systems on the basis of knowledge obtained from these methods.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Engineering


  • Metal-insulator transition
  • Phase-change memory
  • Scanning probe microscopy
  • Magnetic skyrmion

Selected Publications

  • 1. Wang, M., Tanaka, K., Sakai, S., Wang, Z., Deng, K., Lyu, Y., Li, C., Tian, D., Sheng, S., Ogawa, N., Kanazawa, N., Yu, P., Arita, R., and Kagawa, F.:
    "Emergent zero-field anomalous Hall effect in a reconstructed rutile antiferromagnetic metal"
    Nat Commun 14, 8240 (2023).
  • 2. Furuta, S., Moody, H., Kado, K., Koshibae, W., and Kagawa, F.:
    "Energetic perspective on emergent inductance exhibited by magnetic textures in the pinned regime"
    npj Spintronics 1, 1 (2023).
  • 3. Matsuura, Y., Nishizawa, Y., Kinoshita, Y., Kurumaji, T., Miyaka, A., Oike, M., Tokunaga, M., Tokura, Y., and Kagawa, F.:
    "Low-temperature hysteresis broadening emerging from domain-wall creep dynamics in a two-phase competing system"
    Commun. Mat. 4, 71 (2023).
  • 4. Sato, T., Koshibae, W., Kikkawa, A., Taguchi, Y., Nagaosa, N., Tokura, Y., and Kagawa, F.:
    "Nonthermal current-induced transition from skyrmion lattice to nontopological magnetic phase in spatially confined MnSi"
    Phys. Rev. B 106, 144425 (2022).
  • 5. Oike, H., Ebino, T., Koretsune, T., Kikkawa, A., Hirshberger, M., Taguchi, Y., Tokura, Y., and Kagawa, F.:
    "Topological Nernst effect emerging from real-space gauge field and thermal fluctuations in a magnetic skyrmion lattice"
    Phys. Rev. B 106, 214425 (2022).
  • 6. Sato, T., Koshibae, W., Kikkawa, A., Yokouchi, T., Oike, H., Taguchi, Y., Nagaosa, N., Tokura, Y., and Kagawa, F.:
    "Slow steady flow of a skyrmion lattice in a confined geometry probed by resistance narrow-band noise"
    Phys. Rev. B 100, 094410 (2019).
  • 7. Oike, H., Kamitani, M., Tokura, Y., and Kagawa, F.:
    "Kinetic approach to superconductivity hidden behind a competing order"
    Sci. Adv. 4, eaau3489 (2018).
  • 8. Kagawa, F., and Oike, H.:
    "Quenching of Charge and Spin Degrees of Freedom in Condensed Matter"
    Adv. Mat. 29, 1601979 (2017).
  • 9. Kagawa, F., Minami, N., Horiuchi, S., and Tokura, Y.:
    "Athermal domain-wall creep near a ferroelectric quantum critical point"
    Nat. Commun. 7, 10675 (2016).
  • 10. Oike, H., Kikkawa, A., Kanazawa, N., Taguchi, Y., Kawasaki, M., Tokura, Y., and Kagawa, F.:
    "Interplay between topological and thermodynamic stability in a metastable magnetic skyrmion lattice"
    Nat. Phys. 12, 62 (2016).

Recent Research Results

Related Links

Lab Members

Principal investigator

Fumitaka Kagawa
Team Leader

Core members

Tetsuya Nomoto
Postdoctoral Researcher
Samiran Banu
Postdoctoral Researcher
Keisuke Matsuura
Visiting Scientist
Hiroshi Oike
Visiting Scientist
Takuro Sato
Visiting Scientist

Contact Information

209 Frontier Research Laboratory
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: fumitaka.kagawa [at] riken.jp