Extended Data Fig. 4: Shot noise analysis for Au/H2 junctions.
From: Electronic noise due to temperature differences in atomic-scale junctions
The Fano factor extracted from shot noise and conductance measurements20,29 is shown versus the conductance for different junction realizations at 4.6 K (ΔT = 0). The thick red curve provides the minimal Fano factor. Data that accumulate on this line below 1G0 indicate junctions with a single transmission channel22. The dashed line provides the maximal Fano factor that two channels can generate for the relevant conductance. The insets show transmission probabilities of the main six transmission channels based on numerical analysis of the measured Fano factor and conductance32 for the three marked cases (I, II, III) in the main panel. The error bars provide the range of transmission solutions that satisfies the measured conductance and shot noise. Inset I shows that a junction that is characterized by Fano factor and conductance data near the red curve conducts via a single dominant channel with only minor contribution from a secondary channel. In contrast, inset III exemplifies that a junction with Fano factor and conductance data near the dashed curve can conduct via two dominant channels with possible minor contributions from other channels.
