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arXiv · 2404.18712

Anomalous Spin and Orbital Hall Phenomena in Antiferromagnetic Systems

J. E. Abrão·E. Santos·J. L. Costa·J. G. S. Santos·J. B. S. Mendes·A. Azevedo
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Abstract

We investigate anomalous spin and orbital Hall phenomena in antiferromagnetic (AF) materials via orbital pumping experiments. Conducting spin and orbital pumping experiments on YIG/Pt/Ir20Mn80 heterostructures, we unexpectedly observe strong spin and orbital anomalous signals in an out-of-plane configuration. We report a sevenfold increase in the signal of the anomalous inverse orbital Hall effect (AIOHE) compared to conventional effects. Our study suggests expanding the Orbital Hall angle ({\theta}_OH) to a rank 3 tensor, akin to the Spin Hall angle ({\theta}_SH), to explain AIOHE. This work pioneers converting spin-orbital currents into charge current, advancing the spin-orbitronics domain in AF materials.

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J. E. Abrão, E. Santos, J. L. Costa, J. G. S. Santos, J. B. S. Mendes, A. Azevedo. 2024-04-29. Anomalous Spin and Orbital Hall Phenomena in Antiferromagnetic Systems. https://doi.org/10.1103/physrevlett.134.026702

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