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MA: Fachverband Magnetismus

MA 7: Poster Magnetism I

MA 7.83: Poster

Montag, 9. März 2026, 09:30–12:30, P2

Theory of transport properties of coplanar spin spirals — •Ilja Turek — Institute of Physics of Materials, Czech Acad. Sci., Brno, Czech Rep.

Coplanar spin spirals are compensated magnetic systems related closely to the recently introduced p-wave magnets [1]. Their special magnetic order leads to the absence of space-inversion symmetry, which is a necessary prerequisite for a nonzero Edelstein effect (change of magnetization due to an external electric field). Here, we consider simple tight-binding models of nonrelativistic coplanar spin spirals and study their transport properties within the Kubo linear response theory and the conserving selfconsistent Born approximation [2]. We reveal that depending on the model details, both the electric conductivity and the coefficient of the Edelstein effect contain not only a coherent (quadratic in the averaged one-particle propagators) term, but also a nonnegligible incoherent term due to the disorder-induced vertex corrections. Consequences for reliable evaluation of the transport properties of real spin-spiral systems are discussed briefly as well. [1] A. Chakraborty et al., Nat. Commun. 16 (2025) 7270. [2] I. Turek, Phys. Rev. B 93 (2016) 245114.

Keywords: spin spirals; transport properties; Edelstein effect; conserving approximation