Spin Moiré Engineering in Topological Spin Textures

Abstract

Moiré is an interference fringe generated by a superposition of waves. Here, we extend this idea to superpositions of spin density waves in magnets. By using an analogy with moiré in optics, we have studied the effects of three control parameters: amplitudes, twist angles, and phases of superposed spin waves. We clarified that the changes in these parameters bring about various topological spin textures and the emergent electromagnetic field. Our results would pave a way for future studies of investigating and controlling novel magnetic and electronic states through the spin moiré picture.