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Nature, Published online: 02 August 2023; doi:10.1038/d41586-023-02387-x

The ordering of magnetic moments in a strongly correlated system depends on the lattice they inhabit, with triangular lattices yielding exotic phases through an effect called geometrical frustration. Experiments demonstrate that ultracold atoms in such lattices show frustration and, surprisingly, display an ordering called ferromagnetism when mobile charges are present.

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