Figure 1

(a) Electron micrograph of sample 2. (b) Conductance of sample 2 for different temperatures measured in a perpendicular magnetic field [29]. The magnetic field range where the magnetization is rotated from in-plane to out-of-plane is gray-shaded. (c) Increase of resistance with decreasing temperature. This increase stems from EEI as proven by the $-T^{-1/2}$ power law for 1D-systems at $B=0$ and $B=3\mathrm{T}$ in (d). Here, $\Delta G$ is taken relative to the conductivity at 50 mK.Reuse & Permissions

Figure 2

WL contribution for three wire and one 2D sample obtained after subtracting the 120 mK trace as background conductance. To compare the different samples, the total $\Delta G$ was divided by the number of parallel wires. In case of the 2D-sample, 1a $\Delta G$ was divided by 15 to fit into the graph. Again, the gray shaded $B$-range corresponds to the regime where the samples’s magnetization follows the external field and changes direction. The red lines are best fits to Eq. (1), discussed in the text. The fit parameters were $L_{\varphi }=190\mathrm{nm}$ and $L_{\mathrm{SO}}=113\mathrm{nm}$ for sample 2a, $L_{\varphi }=150\mathrm{nm}$ and $L_{\mathrm{SO}}=93\mathrm{nm}$ for sample 2, and $L_{\varphi }=160\mathrm{nm}$ and $L_{\mathrm{SO}}=93\mathrm{nm}$ for sample 3. Fitting the 2D sample requires a different formalism which is beyond the scope of the present Letter.Reuse & Permissions

Figure 3

(a) WL correction of sample 3 fitted with the standard 1D WL theory [Eq. (1)] for spin degeneracy $g_s=1$ (red) and $g_s=2$ (blue). (b) UCFs measured in an individual 1D-wire made from the same material (sample 4). An electron micrograph of the wire is shown in the lower left inset. The gray shaded regime again corresponds to the magnetic field range where $M$ changes direction. The upper inset shows the low-field UCFs in a expanded magnetic field scale. The temperature dependence of $\delta G$, extracted from the low-field fluctuations, is shown in the lower right inset.Reuse & Permissions