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TOPOLOGICAL PHYSICS

A sudden twist

Floquet engineering harnesses alternating fields to create a topological band structure in an otherwise ordinary material. These fields drive plasmons that can spontaneously split into chiral circulating modes and induce magnetization.

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Fig. 1: Different stages of light–matter interaction.

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Correspondence to Luis E. F. Foa Torres.

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Foa Torres, L.E.F. A sudden twist. Nat. Phys. 15, 988–989 (2019). https://doi.org/10.1038/s41567-019-0595-4

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