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arXiv · 2605.22614

Nonlinear Magnon Magnetic Moment Transport in Triangular-Lattice f-Wave Antialtermagnets

Volodymyr P. Kravchuk·Kostiantyn V. Yershov·Bastián Pradenas·Robin R. Neumann·Rodrigo Jaeschke-Ubiergo·Ricardo Zarzuela·Jairo Sinova·Jeroen van den Brink·Alexander Mook
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Abstract

We study the spin excitations in the frustrated coplanar 120-degree ground state of the triangular-lattice Heisenberg antiferromagnet and demonstrate that they carry a magnetic moment perpendicular to the plane in which the spins order, despite the ground-state sublattice moments having no out-of-plane component. The symmetry of the momentum dependence of the magnetic moment and energy of the magnons renders the system an odd-parity f-wave magnet. Extending this model to a stack of antiferromagnetically coupled triangular layers provides a realization of magnons in a three-dimensional f-wave antialtermagnet. We show that nonlinear thermal transport effects of magnons, such as Edelstein and spin-splitter effects, provide clear experimental signatures of magnons in f-wave antialtermagnets.

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Volodymyr P. Kravchuk, Kostiantyn V. Yershov, Bastián Pradenas, Robin R. Neumann, Rodrigo Jaeschke-Ubiergo, Ricardo Zarzuela, Jairo Sinova, Jeroen van den Brink, Alexander Mook. 2026-05-21. Nonlinear Magnon Magnetic Moment Transport in Triangular-Lattice f-Wave Antialtermagnets. https://arxiv.org/abs/2605.22614

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