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arXiv · 2609.03271

Moiré-induced altermagnetism from nonmagnetic constituents

Jingtian Shi·Maxim Khodas·Ivar Martin
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Abstract

We propose a mechanism for nonmagnetic materials to develop altermagnetic order by moiré interference with nonmagnetic substrate, which is driven by structural relaxation and spontaneous twirls in moiré domain walls of lattice-mismatched moiré square lattices. When doped with one electron per moiré domain, a correlated insulating gap is opened by electron interaction. Depending on the location of the moiré potential minima, the moiré bands can show d-wave or g-wave altermagnetic splitting. The former can be enhanced by a finite twist angle; the latter is sensitive to strains that drive a transition to d-wave.

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Jingtian Shi, Maxim Khodas, Ivar Martin. 2026-09-12. Moiré-induced altermagnetism from nonmagnetic constituents. https://arxiv.org/abs/2609.03271

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