Centers & Labs

RIKEN Center for Emergent Matter Science

First-Principles Materials Science Research Team

Team Leader: Ryotaro Arita (Ph.D.)
Ryotaro  Arita(Ph.D.)

By means of first-principles calculation, we study non-trivial electronic properties of correlated/topological materials. We also aim at predicting intriguing phenomena originating from many-body correlations and designing novel functional materials/systems. The long-term goal of our research is to establish new guiding principles for materials design. We are also interested in the development of new methods for electronic structure calculation.

Main Research Field


Related Research Fields

Materials Sciences

Research Subjects

  • First-principles study of correlated/topological materials
  • Theoretical design of functional materials
  • Development of new ab initio methods

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. Y. Nomura and R. Arita.:
    Ab initio downfolding for electron-coupled systems: Constrained density-functional perturbation theory”
    Phys. Rev. B 92, 245108 (2015)
  2. R. Arita, H. Ikeda, S. Sakai and M-T. Suzuki.:
    Ab initio downfolding study of the iron-based ladder superconductor BaFe2S3
    Phys. Rev. B 92, 054515 (2015)
  3. T. Koretsune, N. Nagaosa and R. Arita.:
    “Control of Dzyaloshinskii-Moriya interaction in Mn1-xFexGe: a first-principles study”
    Scientific Reports, 5 13302 (2015)
  4. Y. Nomura, S. Sakai, M. Capone and R. Arita.:
    “Unified understanding of superconductivity and Mott transition in alkali-doped fullerides from first principles”
    Science Advances, 1 e1500568 (2015)
  5. R. Akashi, M. Ochi, S. Bordacs, R. Suzuki, Y. Tokura, Y. Iwasa, and R. Arita.:
    “Two-Dimensional Valley Electrons and Excitons in Noncentrosymmetric 3R-MoS2
    Phys. Rev. Applied, 4, 014002 (2015)
  6. R. Akashi, M. Kawamura, S. Tsuneyuki, Y. Nomura, and R. Arita.:
    “First-principles study of the pressure and crystal-structure dependences of the superconducting transition temperature in compressed sulfur hydrides”
    Phys. Rev. B, 91, 224513 (2015)
  7. H. Ikeda, M-T. Suzuki, R. Arita.:
    “Emergent loop-nodal s+--wave superconductivity in CeCu2Si2: Similarities to the iron-based superconductors”
    Phys. Rev. Lett, 114, 147003 (2015)
  8. *R. Akashi and R. Arita.:
    "Development of density functional theory for plasmon-assisted superconducting state: Application to Lithium under high pressures"
    Phys. Rev. Lett., 111 057006 (2013)
  9. *H. Ikeda, M-T. Suzuki, R. Arita, T. Takimoto, T. Shibauchi, and Y. Matsuda.:
    "Emergent rank-5 nematic order in URu2Si2"
    Nature Physics 8, 528 (2012)
  10. *R. Arita, J. Kunes, A. V. Kozhevnikov, A.G. Eguiluz, and M. Imada.:
    "Ab initio Studies on the Interplay between Spin-Orbit Interaction and Coulomb Correlation in Sr2IrO4 and Ba2IrO4"
    Phys. Rev. Lett. 108, 086403 (2012)

Lab Members

Principal Investigator

Ryotaro Arita
Team Leader

Core Members

Takashi Koretsune
Senior Scientist
Shiro Sakai
Research Scientist
Michito Suzuki
Research Scientist
Sudipta Kanungo
Postdoctoral Researcher
Nayuta Takemori
Special Postdoctoral Researcher
Yusuke Nomura
Visiting Scientist

Contact information

307 Frontier Research Laboratory,
2-1 Hirosawa,
Wako, Saitama

Email: arita [at]

Recent research results

April 21, 2017: RIKEN RESEARCH
A more fundamental approach to correlation
August 28, 2015: RIKEN RESEARCH
Electrons that stick together, superconduct together