  Antiferromagnetic(AFM) skyrmions have been in the spotlight as ideal
topological magnetic bits. Although they are topologically protected, they do
not exhibit the skyrmion Hall effect unlike the ferromagnetic ones. Thus, AFM
skyrmions are considered to provide a better control of the skyrmion's motion
due to the absence of the skyrmion Magnus effect. In this work, we propose a
possible realization of controllable AFM skyrmions in a twisted Moir\'e magnet.
The tunability of Moir\'e materials is not only a good platform for the
provision of rich phases, but also for the stabilization of skyrmion phase. We
investigate the ground state of twisted bilayer AFM system by solving the
Landau-Lifshitz-Gilbert equation in a continuum model. We show that the AFM
skyrmions are stabilized even in the absence of the external/dipolar magnetic
field, as a consequence of the interplay of interlayer coupling,
Dzyaloshinskii-Moriya (DM) interaction and Ising anisotropy. More
interestingly, due to the magnetoelectric effect, the application of an
external electric field locally stabilizes the skyrmions in the twisted bilayer
AFM systems, even in the absence of DM interaction. It also allows the skyrmion
helicity to change continuously when both the DM interaction and an electric
field are present. We show the phase diagram with respect to the strength of
interlayer coupling, the DM interaction and an electric field. Our results
suggest the possibility of using AFM skyrmions as stable, controllable
topological magnetic bits.
