Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 30: Functional Antiferromagnetism
MA 30.2: Vortrag
Mittwoch, 11. März 2026, 09:45–10:00, POT/0151
Multistate probabilistic computing in the chiral kagome antiferromagnet Mn3Sn — •Prajwal Rigvedi1, Jae-Chun Jeon1, Kevin Callahan-Coray2, Kerem Y. Camsari2, and Stuart S.P Parkin1 — 1Max-Planck Institute of Microstructure Physics, Halle (Saale), Germany — 2Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA, USA
Chiral kagome antiferromagnets such as Mn3Sn are promising candidates for spintronic applications due to their ultrafast spin dynamics and negligible stray fields. Their magnetic ground state exhibits six-fold degeneracy, which naturally supports multistate information processing. In this work, we investigate ultra-thin W/Mn3Sn bilayers and demonstrate spin-orbit torque-driven multistate probabilistic switching. Above a critical current density, stochastic fluctuations in the anomalous Hall resistance (Rxy) emerge, and their probability distribution can be continuously tuned with nanosecond electrical pulses. This tunability results in a sigmoidal response of Rxy to the applied current, enabling electrically controlled antiferromagnetic probabilistic bits with multiple accessible states. Leveraging experimentally obtained state statistics, we implement a graph coloring task, an NP-hard optimization problem. These results constitute the first experimental realization of multistate probabilistic switching in an antiferromagnet and demonstrate its applicability to non-deterministic computing tasks. Our findings position non-collinear antiferromagnets as a promising material platform for multibit spintronics, highlighting their potential for unconventional computing architectures.
Keywords: kagome antiferromagnets; Non-collineaer antiferromagnets; Mn3Sn; Probabilistic Computing