Highly efficient non-relativistic Edelstein effect in nodal p-wave magnets

Atasi Chakraborty (), Anna Birk Hellenes, Rodrigo Jaeschke-Ubiergo, Tomás Jungwirth, Libor Šmejkal () and Jairo Sinova ()
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Atasi Chakraborty: Johannes Gutenberg Universität Mainz
Anna Birk Hellenes: Johannes Gutenberg Universität Mainz
Rodrigo Jaeschke-Ubiergo: Johannes Gutenberg Universität Mainz
Tomás Jungwirth: Academy of Sciences of the Czech Republic
Libor Šmejkal: Johannes Gutenberg Universität Mainz
Jairo Sinova: Johannes Gutenberg Universität Mainz

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract The origin and efficiency of charge-to-spin conversion, known as the Edelstein effect (EE), has been typically linked to spin-orbit coupling mechanisms, which require materials with heavy elements within a non-centrosymmetric environment. Here we demonstrate that the high efficiency of spin-charge conversion can be achieved even without spin-orbit coupling in the recently identified coplanar p-wave magnets. The non-relativistic Edelstein effect (NREE) in these magnets exhibits a distinct phenomenology compared to the relativistic EE, characterized by a strongly anisotropic response and an out-of-plane polarized spin density resulting from the spin symmetries. We illustrate the NREE through minimal tight-binding models, allowing a direct comparison to different systems. Through first-principles calculations, we further identify the nodal p-wave candidate material CeNiAsO as a high-efficiency NREE material, revealing a ~ 25 times larger response than the maximally achieved relativistic EE and other reported NREE in non-collinear magnetic systems with broken time-reversal symmetry. This highlights the potential for efficient spin-charge conversion in p-wave magnetic systems.

Date: 2025
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DOI: 10.1038/s41467-025-62516-0

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