  Two-dimensional van der Waals magnets hosting topological magnetic textures,
such as skyrmions, show promise for applications in spintronics and quantum
computing. Electrical control of these topological spin textures would enable
novel devices with enhanced performance and functionality. Here, using electron
microscopy combined with in situ electric and magnetic biasing, we show that
the skyrmion chirality, whether left-handed or right-handed, in insulating
Cr2Ge2Te6, is controlled by external electric field direction applied during
magnetic field cooling process. The electric-field-tuned chirality remains
stable, even amid variations in magnetic and electric fields. Our theoretical
investigation reveals that nonzero Dzyaloshinskii-Moriya interactions between
the nearest neighbors, induced by the external electric field, change their
sign upon reversing the electric field direction, thereby facilitating
chirality selection. The electrical control of magnetic chirality demonstrated
in this study can be extended to other non-metallic centrosymmetric
skyrmion-hosting magnets, opening avenues for future device designs in
topological spintronics and quantum computing.
