Chiral logic computing with twisted antiferromagnetic magnon modes

Autor: Alexander F. Schäffer, Jamal Berakdar, Min Chen, Chenglong Jia
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: npj Computational Materials, Vol 7, Iss 1, Pp 1-8 (2021)
npj Computational Materials
ISSN: 2057-3960
Popis: Antiferromagnetic (AFM) materials offer an exciting platform for ultrafast information handling with low cross-talks and compatibility with existing technology. Particularly interesting for low-energy cost computing is the spin wave-based realization of logic gates, which has been demonstrated experimentally for ferromagnetic waveguides. Here, we predict chiral magnonic eigenmodes with a finite intrinsic, magnonic orbital angular momentum ℓ in AFM waveguides. ℓ is an unbounded integer determined by the spatial topology of the mode. We show how these chiral modes can serve for multiplex AFM magnonic computing by demonstrating the operation of several symmetry- and topology-protected logic gates. A Dzyaloshinskii–Moriya interaction may arise at the waveguide boundaries, allowing coupling to external electric fields and resulting in a Faraday effect. The uncovered aspects highlight the potential of AFM spintronics for swift data communication and handling with high fidelity and at a low-energy cost.
Databáze: OpenAIRE
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