2026/07/21 by SangEun Han, Qiang Li
Physics and Astronomy · #cond-mat.str-el #cond-mat.mes-hall #cond-mat.mtrl-sci
p-wave magnets exhibit odd-parity spin polarization in momentum space, with spin splitting that reverses under k→ -k, while preserving zero net magnetization. Here we show that, in odd-parity magnets with spin-orbit coupling, elliptically polarized light generates a momentum-independent spin-dependent term that dynamically switches a zero-net-magnetization p-wave state into a finite spin-polarized state. The Floquet-engineered bands also acquire a nonzero Chern number whose sign is controlled by the light polarization. For f-wave magnets, circularly polarized light induces a net out-of-plane magnetization, offering a direct experimental signature. Our results establish light as an efficient means of controlling magnetic states, with potential applications in spintronics and quantum information.