Magnon transport in multiferroic antiferromagnet

Magnons (spin-wave quanta) enable ultra-low-dissipation information processing, eclipsing conventional charge-based systems. Multiferroics, with their intrinsically coupled magnetic-electric orders, emerge as a transformative platform for electrically controlled spin/magnon transport, eliminating external magnetic fields and enabling ultra-low-power memory and logic functionalities. Breakthroughs in multiferroics like BiFeO3 now demonstrate long-distance non-volatile magnon transport, where engineered single-domain or confined heterostructures amplify magnon-induced output voltage by several orders of magnitude in the non-local measurements. Such an electrical tunability is critical for next-generation energy-efficient memory/logic devices. Yet fundamental challenges persist: Complex magnetic (spin cycloid) textures and ferroelectric/ferroelastic switching pathways obstruct magnon transport understanding. This perspective provides an understanding of electrical control of magnon creation, propagation, and detection, mapping actionable pathways to unlock the potential of multiferroic antiferromagnets for memory and logic devices.