Fig. 2: Time-resolved two-magnon Raman scattering in YBCO.

a Colormap representing two-magnon peak as a function of time after photoexcitation. Negative times correspond to time before photoexcitation. b, c Raw data at several time delays in the \(x^{\prime}y^{\prime}\) (b) and \(x^{\prime}x^{\prime}\) (c) geometries.