Fig. 4: Microwave noise PSD and dc resistance at selected fields and currents.
a–d PSD (color map) and dc resistance (white lines) of current sweeps at four different fields: a μ0H = 0.35 T, b μ0H = 0.40 T, c μ0H = 0.45 T, and d μ0H = 0.50 T. The insets zoom in on small signals in the PSD; the displayed area is given by the orange dashed box. (Large versions of the insets are found in Fig. S6 in the Supplementary Materials). The red dashed lines mark the nucleation of a single droplet. The current was swept from I = +21 mA to I = −21 mA, but only data for negative currents is shown. e–h PSD (color map) and dc resistance (white lines) of field scans at four different currents: e I = −14 mA (j = −5.0 × 108 A/cm2), f I = −15 mA (j = −5.3 × 108 A/cm2), g I = − 17 mA (j = −6.0 × 108 A/cm2), h I = − 18 mA (j = − 6.4 × 108 A/cm2). A parabolic background is removed from the resistance.
