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arXiv · 2411.16378

Highly Efficient Non-relativistic Edelstein effect in p-wave magnets

Atasi Chakraborty·Anna Birk Hellenes·Rodrigo Jaeschke-Ubiergo·Tomas Jungwirth·Libor Šmejkal·Jairo Sinova
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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 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.

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Atasi Chakraborty, Anna Birk Hellenes, Rodrigo Jaeschke-Ubiergo, Tomas Jungwirth, Libor Šmejkal, Jairo Sinova. 2024-11-25. Highly Efficient Non-relativistic Edelstein effect in p-wave magnets. https://arxiv.org/abs/2411.16378

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