Atasi Chakraborty
The recent discovery of Altermagnetism — spin-split even-parity compensated magnets — highlights how spin symmetries can reveal exchange-driven
phenomena that has previously been overlooked. Building on this insight, we explore spin symmetry criteria [1–3] to identify the odd-parity magnetic states in noncollinear systems, focusing on effects driven purely by exchange interactions, independent of spin–orbit coupling. In this talk, I will focus on the lowest-order (pwave) nodal odd-parity magnets, and discuss their characteristic features using both minimal model and realistic candidate material [1, 2]. We show that these p-wave magnetic phases spontaneously break crystal symmetries, leading to pronounced exchange-mediated resistive anisotropy [1]. Strikingly, they also exhibit a large, purely non-relativistic, anisotropic out-of-plane charge-to-spin conversion [2], fundamentally distinct from the conventional Rashba–Edelstein effect. From our theoretical calculations we further show that the non-relativistic component of Edelstein effect remains dominant even in the presence of spin–orbit coupling for our
candidate material.
References:
1. A. B. Hellenes, T. Jungwirth, R. J. Ubiergo, A. Chakraborty, J. Sinova, L.
Šmejkal, `P-wave magnets’, arXiv:2309.01607v3 (2020).
2. A. Chakraborty, A. B. Hellenes, R. J. Ubiergo, T. Jungwirth, L, Šmejkal, J.
Sinova, `Highly efficient non-relativistic Edelstein effect in nodal-wave
magnets’, Nature Communications 16, 7270 (2025).
3. T. Jungwirth, R. M. Fernandes, J. Sinova, L. Šmejkal, `Altermagnets and beyond:
Nodal magnetically-ordered phases’, arXiv:2409.10034v1 (2024)