Figure 2

Two plasmon model for Co nanoparticles absorbance. ɷ_sp is taken to be 280 nm for wavelength, \({{\rm{\Gamma }}}_{\uparrow }\approx 6.55E+14\,rad/s\), \({{\rm{\Gamma }}}_{\downarrow }=20{{\rm{\Gamma }}}_{\uparrow }\). Green is the sum of red (spin up) and blue (spin down). Insert: a cartoon of the projected density of states typical for Co.