Skyrmion interactions and lattices in chiral magnets: analytical results

Calum Ross, Norisuke Sakai, Muneto Nitta

研究成果: Article査読

抄録

We study two-body interactions of magnetic skyrmions on the plane and apply them to a (mostly) analytic description of a skyrmion lattice. This is done in the context of the solvable line, a particular choice of a potential for magnetic anisotropy and Zeeman terms, where analytic expressions for skyrmions are available. The energy of these analytic single skyrmion solutions is found to become negative below a critical point, where the ferromagnetic state is no longer the lowest energy state. This critical value is determined exactly without the ambiguities of numerical simulations. Along the solvable line the interaction energy for a pair of skyrmions is repulsive with power law fall off in contrast to the exponential decay of a purely Zeeman potential term. Using the interaction energy expressions we construct an inhomogeneous skyrmion lattice state, which is a candidate ground states for the model in particular parameter regions. Finally we estimate the transition between the skyrmion lattice and an inhomogeneous spiral state.

本文言語English
論文番号95
ジャーナルJournal of High Energy Physics
2021
2
DOI
出版ステータスPublished - 2021 2

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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