Centers & Labs

RIKEN Center for Emergent Matter Science

Spin Physics Theory Research Team

Team Leader: Gen Tatara (D.Sci.)
Gen  Tatara(D.Sci.)

Our aim is to explore novel spin-related effects with extremely high efficiency in condensed matters. We thus contributes to development of spintronics, a technology using spin as well as charge of electrons, and to realization of ultrafast and high-density information technology with low energy consumption. Our particular interest is at present in a strong quantum relativistic effect in solids, which is applicable to very strong magnets and efficient conversion of spin information to an electric signal. Our main method is a field theory.

Main Research Field


Related Research Fields

Engineering / Materials Sciences

Research Subjects

  • Novel magnetoelectric effects based on spintronics
  • Conversion mechanism of spin and charge
  • Ultrafast magentization reversal by electric current and light

Selected Publications

  1. Fumiya Nagasawa, Diego Frustaglia, Henri Saarikoski, Klaus Richter, and Junsaku Nitta:
    "Control of spin geometric phase in semiconductor quantum rings"
    Nature Communications 4, 2526 (2013).
  2. G. Tatara, N. Nakabayashi and Kyun-Jin Lee:
    "Spin motive force induced by Rashba interaction in the strong sd coupling regime"
    Phys. Rev. B 87 054403 (1-9) (2013).
  3. G. Tatara, Hiroaki T. Ueda, Katsuhisa Taguchi, Yuta Sasaki, Miyuki Nishijima and Akihito Takeuchi.:
    "Proposal for an active electromagnetic metamaterial based on spin-torque oscillators"
    Phys. Rev. B, 87, 155102 (1-8) (2013 ).
  4. Katsuhisa Taguchi, Jun-ichiro Ohe and Gen Tatara:
    "Ultrafast magnetic vortex core switching driven by topological inverse Faraday effect"
    Phys. Rev. Lett. 109 , 127204 (1-5) (2012).
  5. Akihito Takeuchi and Gen Tatara:
    "Spin Damping Monopole"
    J. Phys. Soc. Jpn. 81 033705 (1-4) (2012).
  6. Gen Tatara, Hiroshi Kohno and Junya Shibata:
    "Microscopic Approach to Current-driven Domain Wall Dynamics"
    Phys. Rep., 468 , 213-301 (2008).
  7. Gen Tatara and Hidetoshi Fukuyama:
    "Phasons and Excitations in Skyrmion Lattice"
    J. Phys. Soc. Jpn., 83 104711(1-15) (2014).
  8. Henri Saarikoski, Hiroshi Kohno, Christopher H. Marrows, and Gen Tatara:
    "Current-driven dynamics of coupled domain walls in a synthetic antiferromagnet"
    Phys. Rev. B, 90, 094411(1-8) (2014).
  9. Hideo Kawaguchi and Gen Tatara:
    "Coupling Theory of Emergent Spin Electromagnetic Field and Electromagnetic Field"
    J. Phys. Soc. Jpn., 83, 074710 (1-6) (2014).
  10. N. Nakabayashi and G. Tatara:
    "Rashba-induced spin electromagnetic _elds in a strong sd coupling region"
    New J. Phys., 16 015016 (1-18) (2014).

Lab Members

Principal Investigator

Gen Tatara
Team Leader

Core Members

Henri Mikael Saarikoski
Research Scientist
Naoya Arakawa
Postdoctoral Researcher
Toru Kikuchi
Postdoctoral Researcher
Yan-Ting Chen
Postdoctoral Researcher
Pablo Borys Sosa
Postdoctoral Researcher
Atsuo Shitade
Special Postdoctoral Researcher
Hideo Kawaguchi
Junior Research Associate

Contact information

2-1 Hirosawa, Wako, Saitama
351-0198 Japan

Email: gen.tatara [at]

Related links

Recent research results

August 19, 2016: RIKEN RESEARCH
A changed exchange for magnetic materials