An intrinsic magnetic topological insulator with gapped surface states would be very useful for both fundamental and application prospects. Now, the use of the time-periodic drive of a laser makes these states not only possible, but also tunable.
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Ojeda-Aristizabal, C. Gap-opening time periodic perturbations. Nat. Phys. 21, 342–343 (2025). https://doi.org/10.1038/s41567-025-02805-z
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DOI: https://doi.org/10.1038/s41567-025-02805-z
