Fig. 3: Temperature dependence of extracted bias position of Yu–Shiba–Rusinov (YSR) peaks in charge state Y.
From: Temperature induced shifts of Yu–Shiba–Rusinov resonances in nanowire-based hybrid quantum dots
a Temperature dependence of peak position at the electron-hole symmetry point across the doublet (red) → singlet (blue) ground state (GS) transition. The datasets have been fitted to parabolas y = a0 + a1T + a2T2 (solid lines) in order to indicate that they do not change faster than T2. b Peak position corresponding to the lowest and highest temperature data points in each of the datasets from a vs. g ~ J, the exchange coupling. Shifts towards the bias voltage (Vsd) points Vsd = Δ (Vsd = 0) are indicated by green (red) arrows. Solid lines end at the temperature above which the Gaussian fit cannot be reliably carried out, corresponding to the highest temperature shown in a for each dataset. The arrows are extended beyond that as dotted lines up to the final position of the YSR peaks at 1.2 K. c Temperature dependence of bias position of YSR peaks of doublet GS in a normalized by their bias position values at 22 mK. This plot brings forward the non-monotonic behavior observed closest to the doublet–singlet GS transition from the doublet side. The same symbols as in a are used. d Peak position vs. plunger gate voltage, VP, at different temperatures. Error bars in a, c and d correspond to standard deviation.
