Publicly Offered Research
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
In the last year, we have focused on the interplay between the Kondo effect and magnetic properties (1) and at the influence of a Rashba-like hybridization on the emergence of exceptional points (2) in non-centrosymmetric f-electron materials.(1) As commonly known in f-electron materials, the magnetic phase competes with the paramagnetic phase dominated by the Kondo effect. In non-centrosymmetric f-electron materials, the Rashba interaction affects both phases by splitting the electronic bands for different spin-directions. We found that the Rashba interaction can strengthen the antiferromagnetic phase in these materials. An antiferromagnetic phase is formed in the non-centrosymmetric system even for hybridization strengths, for which in the centrosymmetric system, the Kondo effect dominates, and a paramagnetic phase is formed. Most strikingly, we found that this antiferromagnetic phase with strong Rashba interaction is metallic, and we were able to show that this metallic antiferromagnetic phase exhibits a strong magnetoelectric effect, which can be used for spintronics devices.(2) In a second project, we have analyzed the emergence of exceptional points in f-electron materials with Rashba-like hybridization. We have demonstrated that the exceptional points can occur in these materials, which are connected by Fermi arcs. Furthermore, we have shown that there are complex manifolds of exceptional points in the combined space of momentum and energy, which change their shape when the temperature is increased or decreased.
令和元年度が最終年度であるため、記入しない。
All 2020 2019 2018
All Journal Article (10 results) (of which Int'l Joint Research: 1 results, Peer Reviewed: 10 results) Presentation (8 results) (of which Int'l Joint Research: 3 results, Invited: 1 results)
Physical Review B
Volume: 101 Issue: 8 Pages: 085122-19
10.1103/physrevb.101.085122
Volume: 101 Issue: 12 Pages: 125103-112
10.1103/physrevb.101.125103
Volume: 100 Issue: 8 Pages: 085124-111
10.1103/physrevb.100.085124
Volume: 99 Issue: 15 Pages: 155141-111
10.1103/physrevb.99.155141
Volume: 99 Issue: 12 Pages: 1211011-5
10.1103/physrevb.99.121101
Volume: 98 Issue: 7 Pages: 0751041-9
10.1103/physrevb.98.075104
Volume: 98 Issue: 3 Pages: 0351411-7
10.1103/physrevb.98.035141
Physical Review Letters
Volume: 121 Issue: 2 Pages: 025301-025301
10.1103/physrevlett.121.025301
Volume: 98 Issue: 19 Pages: 1951111-11
10.1103/physrevb.98.195111
Volume: 98 Issue: 11 Pages: 1151471-9
10.1103/physrevb.98.115147
