Strongly Correlated Spin Research Team

Principal Investigator

PI Name Hazuki Furukawa
Degree Ph.D.
Title Team Leader
Brief Resume
1995Ph. D. in Physics, University of Tokyo
1995Special researcher on Basic Science, The Institute of Physical and Chemical Research (RIKEN)
1998Research Associate, Oak Ridge National Lab.
1999Associate Professor, Dep. of Physics, Faculty of Science, Ochanomizu Univ.
1999PRESTO, Japan Science and Technology Agency
2003Full Professor, Dep. of Physics, Faculty of Science, Ochanomizu Univ.
2007Full Professor, Division of Natural/Applied Science, Graduate School of Humanities and Sciences,
2015Full Professor, Faculty of Core Research Natural Science Division, Ochanomizu University (-present)
2016Team Leader, Strongly Correlated Spin Research Team, Strong Correlation Physics Division, RIKEN Center for Emergent Matter Science (-present)

Outline

Our team studies the static and dynamic magnetic and atomic structure of strongly correlated electron systems using various neutron scattering techniques. We are working to verify the relevance of physical characteristics in controlling and enhancing the behavior of these systems.
Research topics include; (1) Elucidation of the role of spin-orbit interactions in quantum states of newly discovered exotic superconductors, (2) Verification of FFLO phase and/or helical vortex phase, and (3) Study of the dynamics of skyrmions in topological magnetic materials.

Research Fields

Physics, Materials Sciences

Keywords

Strongly correlated electron system
Magnetism
Superconductivity
Skyrmion
Neutron scattering

Results

SANS experiment on beta−PdBi2 superconductor

For topological superconductors, special particles, so-called Majorana fermions, are predicted to appear on the surface of the material. We studied a candidate material of topological superconductors, β-PdBi2 (space group I4/mmm, Tc = 5.4 K), to bare its bulk properties including superconducting symmetry and gap structures by small angle neutron scattering (SANS) technique. For the measurements, we succeeded in growing single crystals of β-PdBi2 by a melt growth method and Tc of the crystals was evaluated to be Tc = 5.2 K by magnetization measurements. With fields parallel to the c-axis, triangle FLL patterns were always observed in all temperature/field conditions studied. Temperature dependence of the integrated intensity at 0.3 T with field parallel to the c-axis shows full gap type T-dependence. We also measured FLL patterns with rotating fields towards ab-plan and evaluated distortion to see anisotropic features of superconducting properties.

SANS data for Bragg reflections from the vortex lattice in β-PdBi2.

Members

Hazuki Furukawa

Team Leader hazuki.furukawa[at]riken.jp R

Minoru Soda

Research Scientist

お問い合わせ

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

E-mail:
hazuki.furukawa[at]riken.jp

Links

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