First-principles evaluation of the dzyaloshinskii–moriya interaction

Takashi Koretsune, Toru Kikuchi, Ryotaro Arita

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

We review recent developments of formulations to calculate the Dzyaloshinskii–Moriya (DM) interaction from first principles. In particular, we focus on three approaches. The first one evaluates the energy change due to the spin twisting by directly calculating the helical spin structure. The second one employs the spin gauge field technique to perform the derivative expansion with respect to the magnetic moment. This gives a clear picture that the DM interaction can be represented as the spin current in the equilibrium within the first order of the spin–orbit couplings. The third one is the perturbation expansion with respect to the exchange couplings and can be understood as the extension of the Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction to the noncentrosymmetric spin–orbit systems. By calculating the DM interaction for the typical chiral ferromagnets Mn1xFexGe and Fe1xCoxGe, we discuss how these approaches work in actual systems.

Original languageEnglish
Article number041011
Journaljournal of the physical society of japan
Volume87
Issue number4
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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