Figure 2: Coexistence of HS and LS states of Fe-phen molecules on Cu(100).
From: Robust spin crossover and memristance across a single molecule
(a) Fe 2p XAS spectra of Fe-phen powder reference sample obtained at 200 K (HS state: top) and 100 K (LS state: middle), and two monolayers of Fe-phen thin film on Cu(100) obtained at 50 K (bottom). Reproduction of Fe 2p XAS L3 (b) and L2 (c) edges of two monolayers Fe-phen using the reference spectra for the HS and LS states obtained on the powder sample. Green circles represent the experimental data of the thin film, black lines the reproduced spectra obtained from the linear combination of the powder spectra of the HS state (red dotted line) and LS state (blue dotted line). The black dotted line represents the background. XAS and XMCD spectra of (d) two monolayers Fe-phen thin film on Cu(100) measured at 1.5 K and 6.5 T, and (e) Fe-phen powder reference sample measured at 4 K and 6.5 T. To obtain dichroic signal, the helicity of the X-ray was reversed between circular right (CR) and circular left (CL). The black dotted line shows the zero line of the XMCD signal.
