Experimental evidence for charge coupling to ferroelectric soft mode is scarce. Here, the authors find a photogenerated coherent phonon coupling to the electronicion above the bandgap in the van der Waals ferroelectric semiconductor NbOI2.
Experimental evidence for charge coupling to ferroelectric soft mode is scarce. Here, the authors find a photogenerated coherent phonon coupling to the electronicion above the bandgap in the van der Waals ferroelectric semiconductor NbOI2.