Research Specifications

Chiral magnetic skyrmions are topologically protected spin textures of intense interest for both fundamental physics and next-generation spintronic devices. Their stability arises from Dzyaloshinskii–Moriya interactions (DMIs) in systems with broken inversion symmetry and strong spin–orbit coupling. Here, anisotropic DMI is analyzed in magnetic thin lms with coexisting Rashba and Dresselhaus spin–orbit couplings under off-resonant electromagnetic driving. Employing a Floquet perturbative approach, an effective Hamiltonian that includes the light-induced exchange interactions is derived. The analysis reveals that Rashba and Dresselhaus spin–orbit couplings yield DMI contributions of equal magnitude but with a relative phase shift under eld driving. This phasesensitive asymmetry induces anisotropic DMI, thereby controlling the chirality and helicity of skyrmion spin textures. It is shown that eld-driven anisotropy strongly modulates the DMI coupling coefcients. These results provide a new strategy to dynamically engineer DMI and skyrmion properties via light and spin– orbit interactions, offering design principles for recongurable skyrmion-based devices.