• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2017 Fiscal Year Final Research Report

Theoretical search and control of toroidal moment hidden in magnetic states with strong spin-orbit coupling

Research Project

  • PDF
Project/Area Number 16H06590
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Condensed matter physics II
Research InstitutionHokkaido University

Principal Investigator

Hayami Satoru  北海道大学, 理学研究院, 助教 (20776546)

Project Period (FY) 2016-08-26 – 2018-03-31
Keywords強相関電子系 / 磁性 / 反対称スピン軌道相互作用 / トロイダルモーメント / 多極子 / 局所的な反転対称性の破れ / マルチフェロイクス / 遍歴電子系
Outline of Final Research Achievements

We microscopically formulated toroidal moments in the absence of time-reversal and spatial inversion symmetries. We also investigated how to observe and control toroidal moments in experiments from the theoretical side. (1)We derived an effective spin-orbit coupling under the toroidal ordering for the model including the crystalline-electric field, atomic spin-orbit coupling, and electron correlation by perturbative analysis. (2) We clarified that toroidal moments are induced around the nonmagnetic impurity site in the ferromagnets with the strong spin-orbit coupling on the triangular lattice. (3) We examined the 5d transition oxide KOsO4, which is a potential candidate showing toroidal moments.

Free Research Field

物性理論

URL: 

Published: 2019-03-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi