Extended Data Fig. 6: Total thermoelectric voltage and its estimated contribution to the excess noise.
From: Electronic noise due to temperature differences in atomic-scale junctions
a, Measured total thermoelectric voltage for the examined junctions as a function of conductance at \(\bar{T}\) = 26.3 ± 0.7 K and ∆T = 25.3 ± 0.6 K. Measurements were performed according to the method described in ref. 30. Here, we are interested in the total thermoelectric voltage that is built across the junction, since it can be a source for shot noise. b, Calculated shot noise (red curve) that is expected for the maximal measured thermovoltage in a (155 µV, marked as a red star in a), and the measured excess noise (dark circles) at the same \(\bar{T}\) and ∆T for which the thermoelectric voltage was measured. Calculated delta-T noise is given by the black curve for a single transmission channel, and by the dashed curve for two channels with equal transmission probabilities (non-approximated numerical calculations based on equation (S2) in Supplementary Information).
