Polarization-resolved high-harmonic generation spectra in bilayer Td-WTe2 exhibit robust signatures of mirror-symmetry breaking from sliding ferroelectricity, enabling all-optical identification of the polarization state.
Neufeld , author D
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Probing sliding ferroelectricity in bilayer T$_\mathrm{d}$-WTe$_2$ with high-harmonic generation
Polarization-resolved high-harmonic generation spectra in bilayer Td-WTe2 exhibit robust signatures of mirror-symmetry breaking from sliding ferroelectricity, enabling all-optical identification of the polarization state.