A two-color, linearly polarized laser field that preserves time-reversal symmetry produces no photocurrent in graphene, and this suppression is lifted in magnets and Floquet Chern insulators, offering an ultrafast probe of broken time-reversal symmetry.
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Probing broken time-reversal symmetry with tailored-light photocurrents
A two-color, linearly polarized laser field that preserves time-reversal symmetry produces no photocurrent in graphene, and this suppression is lifted in magnets and Floquet Chern insulators, offering an ultrafast probe of broken time-reversal symmetry.