Majority gate for two-dimensional ferromagnets lacking inversion symmetry

Abstract

The manipulation of topologically protected field configurations such as skyrmions, merons, and antimerons, already predicted and experimentally observed in noncentrosymmetric magnets, could definitely have potential applications in logic gate operations as carriers of information. Here, we present and elaborate a proof of concept on how to construct a three-input noncanonical majority gate on a kagome ferromagnet lacking inversion symmetry. By taking advantage of the existence of edge modes in a kagome magnet, it is possible to create topological excitations such as merons and antimerons at the edge of the material. Using atomistic spin dynamics simulations, we determine the precise physical conditions for the creation and annihilation of merons and antimerons and, in a second stage, we describe the majority gate functionality.