Fig. 3: Electron energy-loss intensities for various q∣∣ and q⊥ values.
From: Optical and acoustic plasmons in the layered material Sr2RuO4

The indicated numbers (1–6) and the colors correspond to the momentum values depicted in Fig. 2. Experimental spectra are depicted twice (normal scale + 30x/60x scaled up) to show both the zero loss peak and the plasmon peak. The black dashed lines correspond to fits of a superposition of a Voigt profile (zero loss), a Drude function (plasmons), and a background (see Methods).