Fig. 4: Evolution of libronic fingerprints with the gap size.
From: Evidence of exciton-libron coupling in chirally adsorbed single molecules
a Experimental (black dots) and simulated (solid blue lines) STM-EL fine spectra of Q+ peak of MgPc+ as a function of increasing tip-sample separation by Δz. V = −3 V, I ranges from 113 pA (bottom spectrum) to 19 pA (top spectrum). Acquisition time was 120 s for Δz = 0, 0.5, 1 Å and 360 s for Δz = 1.5 and 2 Å. b, c The energy E00, linewidth γ and reducing factor A as a function of Δz obtained from the fitting procedure of data in a. Average values of fitting parameters: k0 = (1.42 ± 0.01) meV/(°)2, k1 = (1.69 ± 0.04) meV/(°)2, Δϕ0 = (0.69 ± 0.03)°, Teff = (82 ± 10) K. Source data are provided as a Source Data file.
