Figure 2: Detection of the indirect conduction electron-mediated exchange interactions.
From: Tailoring the chiral magnetic interaction between two individual atoms
(a) ISTS on FehcpH2 (green) and Fehcp (red) within selected pairs of different configuration (b) and separation d (topographs shown in insets) in comparison to the spectra measured on the corresponding isolated atoms (grey). The exchange interaction within the pair forces a splitting of the Kondo resonance of FehcpH2 and a modification of the magnetic excitation of Fe as compared with the isolated atoms (experimental ISTS parameters: Vs=6 mV, Is=3 nA, Vmod=40 μV, the spectra are normalized (Norm.) by division by a substrate spectrum measured with the same tip). (b) Positions of FehcpH2 (green) and Fehcp (red, 1–4) for the pairs of a with respect to the substrate atoms (grey). (c) The exchange field resulting from magnetic coupling is mimicked as an effective magnetic field (|Beff|), which is determined by fitting the splitting of the Kondo resonance of pairs of different distances d. The grey dashed line is a guide to the eye and the maximum error bar was determined to be 0.5 T.
