Nature Physics, Published online: 23 April 2025; doi:10.1038/s41567-025-02819-7
Controlling the propagation of spin currents with opposite polarities in antiferromagnets has remained challenging. Now the frequency of coherently excited spin waves in a haematite-based device is shown to control the sign of the spin current.Nature Physics, Published online: 22 April 2025; doi:10.1038/s41567-025-02884-y
Converting photons from one frequency range to another uses nonlinear effects that are often weak. Strong nonlinearities in rare-earth-ion-doped crystals have now been used to perform microwave-to-optical transduction at the single-photon level.Nature Physics, Published online: 22 April 2025; doi:10.1038/s41567-025-02873-1
Skyrmion bags—textures comprising multiple skyrmions contained within a larger skyrmion—have been reported in several condensed matter systems. Now an optical analogue of these structures has been observed in plasmonic moiré superlattices.
