Formation Mechanism of the Helical Q Structure in Gd-Based Skyrmion Materials

Takuya Nomoto, Takashi Koretsune, Ryotaro Arita

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Using the ab initio local force method, we investigate the formation mechanism of the helical spin structure in GdRu2Si2 and Gd2PdSi3. We calculate the paramagnetic spin susceptibility and find that the Fermi surface nesting is not the origin of the incommensurate modulation, in contrast to the naive scenario based on the Ruderman-Kittel-Kasuya-Yosida mechanism. We then decompose the exchange interactions between the Gd spins into each orbital component, and show that spin-density-wave type interaction between the Gd-5d orbitals is ferromagnetic, but the interaction between the Gd-4f orbitals is antiferromagnetic. We conclude that the competition of these two interactions, namely, the interorbital frustration, stabilizes the finite-Q structure.

本文言語English
論文番号117204
ジャーナルPhysical review letters
125
11
DOI
出版ステータスPublished - 2020 9

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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