Fig. 2: Spin averaged electronic structure of (3,1,8)-chGNRs on GdAu2.
From: Detecting the spin-polarization of edge states in graphene nanoribbons
(T = 4.3K, B = 0 T, W tip). a Constant height current with CO functionalized tip at Vb = − 3.7 mV of a N = 21 ribbon (open feedback at ribbon’s centre with current SP of 50 pA). b Simulation of the GNR DoS within the Mean Field Hubbard (MFH) model at the energy indicated by the grey arrow in (e), U = 1 eV and two electrons added (see Methods). c High-resolution dI/dV spectra (SP:−100 mV, 200 pA, Vmod = 0.7 mV) taken at the positions given by the colored circles in (a). d Constant current dI/dV maps at the energy values marked by dashed lines in (c) with the same color code (SP: -150 mV, 125pA, Vmod = 10 mV). e Projected DoS from MFH calculations (see Theoretical Methods) at the atomic sites enclosed by the transparent rectangle in (b). Bottom panel corresponds to the charge-neutral case without e-e interactions, top panel corresponds to the charged system with 2 electrons for U = 0 and U = 1 eV. Dashed lines in (c) and (e) indicate the energy positions of the HOMO (green), LUMO (black) and LUMO+2 (blue) named after their equivalent states in the charge-neutral specimen, where the zero-energy peak corresponds to the topological end-state (TES, see main text).
