Ultrafast room-temperature non-volatile light-matter polar order manipulation in charge density wave of quantum materials

https://arxiv.org/abs/2310.10293

"induce long-lasting fully reversible electronic states using laser excitations... charge-density-wave material EuTe4... all-optical... modifies electrical resistance, 2nd harmonic generation intensity, resulting in layer-specific phase inversion dynamics by which photoexcitation mediates stacking polar order... extends scope of non-volatile all-optical control of electronic states to ambient conditions... distinct role of layer dependent phase manipulation in quasi-two-dimensional systems with inherent sublayer stacking orders"