Chakraborty Atasi, Birk Hellenes Anna, Jaeschke-Ubiergo Rodrigo, Jungwirth Tomás, Šmejkal Libor, Sinova Jairo
Institut für Physik, Johannes Gutenberg Universität Mainz, Mainz, Germany.
Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, Praha 6, Czech Republic.
Nat Commun. 2025 Aug 7;16(1):7270. doi: 10.1038/s41467-025-62516-0.
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.
电荷到自旋转换的起源和效率，即所谓的埃德尔斯坦效应（EE），通常与自旋轨道耦合机制有关，而这需要在非中心对称环境中含有重元素的材料。在此，我们证明，在最近发现的共面p波磁体中，即使没有自旋轨道耦合，也能实现高效率的自旋-电荷转换。与相对论性EE相比，这些磁体中的非相对论性埃德尔斯坦效应（NREE）表现出独特的现象学特征，其特点是具有强烈的各向异性响应以及由自旋对称性导致的面外极化自旋密度。我们通过最小紧束缚模型来说明NREE，以便能直接与不同系统进行比较。通过第一性原理计算，我们进一步确定节点p波候选材料CeNiAsO为一种高效NREE材料，其响应比在具有破缺时间反演对称性的非共线磁系统中实现的最大相对论性EE以及其他已报道的NREE大~25倍。这突出了p波磁系统中高效自旋-电荷转换的潜力。
