RIKEN Center for Emergent Matter Science Strong Correlation Quantum Structure Research Group
Group Director: Takahisa Arima (Ph.D.)
Research Summary
Strongly correlated electron systems may exhibit various interesting emergent phenomena such as superconductivity, colossal magneto-resistance, and giant magneto-electric effects. These emergent phenomena are directly associated with the spatial distributions as well as the spatial and temporal fluctuations of atoms, electron density, and spin density. We are going to perform crystallographic and magnetic structure analyses, spectroscopies, and microscopies by using synchrotron x-rays, neutrons, and high-energy electron beams to reveal them.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Interdisciplinary Science & Engineering
Keywords
- x-ray
- neutron
- optical properties
- multiferroics
Selected Publications
- 1.
M. Gen, H. Ishikawa, A. Miyake, T. Yajima, H. O. Jeschke, H. Sagayama, A. Ikeda, Y. H. Matsuda, K. Kindo, M. Tokunaga, Y. Kohama, T. Kurumaji, Y. Tokunaga, T. Arima.:
"Breathing pyrochlore magnet CuGaCr4S8: Magnetic, thermodynamic, and dielectric properties"
Phys. Rev. Materials, 7, 104404 (2023) - 2.
S. Kitou, M. Gen, Y. Nakamura, K. Sugimoto, Y. Tokunaga, S. Ishiwata, T. Arima.:
"Real-Space Observation of Ligand Hole State in Cubic Perovskite SrFeO3"
Adv. Sci., 10, 2302839 (2023) - 3.
M. Gen, R. Takagi, Y. Watanabe, S. Kitou, H. Sagayama, N. Matsuyama, Y. Kohama, A. Ikeda, Y. Onuki, T. Kurumaji, T. Arima, S. Seki.:
"Rhombic skyrmion lattice coupled with orthorhombic structural distortion in EuAl4"
Phys. Rev. B 107, L020410 (2023) - 4.
J. Ju, H. Saito, T. Kurumaji, M. Hirschberger, A. Kikkawa, Y. Taguchi, T. Arima, Y. Tokura, T. Nakajima.:
"Polarized neutron scattering study of the centrosymmetric skyrmion host material Gd2PdSi3"
Phys. Rev. B 107, 024405 (2023) - 5.
V. Ukleev, O. Utesov, L. Yu, C. Luo, K. Chen, F. Radu, Y. Yamasaki, N. Kanazawa, Y. Tokura, T. Arima, J. S. White.:
"Signature of anisotropic exchange interaction revealed by vector-field control of the helical order in a FeGe thin plate"
Phys. Rev. Research 3, 013094 (2021) - 6.
T. Nakajima, T. Oda, M. Hino, H. Endo, K. Ohishi, K. Kakurai, A. Kikkawa, Y. Taguchi, Y. Tokura, T. Arima.:
"Crystallization of magnetic skyrmions in MnSi investigated by neutron spin echo spectroscopy"
Phys. Rev. Research 2, 043393 (2020) - 7.
V. Ukleev, Y. Yamasaki, O., Utesov, K. Shibata, N. Kanazawa, N. Jaouen, H. Nakao, Y. Tokura, T. Arima.:
"Metastable solitonic states in the strained itinerant helimagnet FeGe"
Phys. Rev. B 102, 014416 (2020) - 8.
S. Gao, D. Hirai, H. Sagayama, H. Ohsumi, Z. Hiroi, T. Arima.:
"Antiferromagnetic long-range order in the 5d1 double-perovskite Sr2MgReO6"
Phys. Rev. B 101, 220412R (2020) - 9.
Y. Ishii, K. Yamamoto, Y. Yokoyama, M. Mizumaki, H. Nakao, T. Arima, Y. Yamasaki.:
"Soft-X-ray Vortex Beam Detected by Inline Holography"
Phys. Rev. Appl. 14, 064069 (2020) - 10.
S. Gao, M. Hirschberger, O. Zaharko, T. Nakajima, T. Kurumaji, A. Kikkawa, J. Shiogai, A. Tsukazaki, S. Kimura, S. Awaji, Y. Taguchi, T. Arima, Y. Tokura.:
"Ordering phenomena of spin trimers accompanied by a large geometrical Hall effect"
Phys. Rev. B 100, 241115(R) (2019)
Recent Research Results
-
Oct. 30, 2023
Simulating spins, spirals and shrinking devices -
Jun. 10, 2017
A skyrmion square dance -
Oct. 13, 2015
Just a touch of skyrmions -
Jul. 3, 2015
A surprisingly simple magnetic flip -
May 15, 2015
Flicking the switch on spin-driven devices
Related Links
Lab Members
Principal investigator
- Takahisa Arima
- Group Director
Core members
- Kamini Gautam
- Postdoctoral Researcher
- Kazuhisa Kakurai
- Senior Visiting Scientist
- Yuichi Yamasaki
- Senior Visiting Scientist
- Hiroshi Sawa
- Visiting Scientist
- Hajime Sagayama
- Visiting Scientist
- Taro Nakajima
- Visiting Scientist
- Takashi Kurumaji
- Visiting Scientist
- Shunsuke Kito
- Visiting Scientist
- Masaki Gen
- Visiting Scientist
Contact Information
2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: takahisa.arima [at] riken.jp