Figure 4: Spin-resolved STM and point spectroscopy data of the LUMO.
From: Real-space observation of spin-split molecular orbitals of adsorbed single-molecule magnets
(a) Spin-resolved point-mode spectroscopy of TbPc2. Blue (dark), parallel alignment of tip and sample magnetization direction; red (light grey), antiparallel. (b) Difference of the spectroscopic curves of the antiparallel and parallel case from (a), providing a measure of the spin polarization. The area of blue (dark) and red (light grey) parts are equal, indicating that there is no net magnetization. Smooth red and blue curve: fit by two Lorentzian functions. (c,d) Differences of maps of spin-resolved differential tunnelling conductance for (c) U=+1.0 V and (d) U=+1.3 V, providing maps of the spin polarization of the molecular orbitals at the given voltages. Both orbitals show the same spatial distribution, but have opposite spin polarization. The black scale bar corresponds to 1 nm. (e) Schematic of the electronic structure of TbPc2 adsorbed on a cobalt nanostructure, depicted according to Fig. 1.
