Stabilization of biskyrmions by chiral interaction in centrosymmetric magnets

Abstract

We report a microscopic mechanism for stabilization of biskyrmions in two dimensions by investigating a minimal model of classical spins on a triangular lattice with nearest-neighbor ferromagnetic Heisenberg exchange and static chiral interaction on each triangular plaquette. Our results establish that the chiral magnetic interaction results in biskyrmion states above a critical value, and its strength affects the size of the biskyrmions forming. We further explore the effects of thermal fluctuations on the biskyrmion states.