Figure 3
(a) Representative time series of the measured tip current for one image pixel at fixed polarization and photon energy. (b) 95% confidence interval for this pixel as a function of sampling time. (c) Examples of the average tip current including standard deviations for three different photon energies (dotted circles); LCP: blue; RCP: red. The LCP reference spectrum recorded with a stationary but tunneling tip exhibits Fe L2,3 absorption peaks. |