Figure 4.

Root-mean-square conductance fluctuation magnitude δG_rmsas function of temperature for NW1 and NW2 devices. The dot-dashed, dashed, and dotted curves are the theoretical predictions of Equation 1 with the exponent of temperature p = 2, 3, and 4, respectively, for the electron-phonon relaxation rate 1/τ_ep = A_epT^p. The inset shows the extracted electron dephasing length L_φ as a function of temperature for the two nanowires. The dashed curve indicates a T³ temperature dependence. The data points at 10 K could be subject to large uncertainties and are only drawn for reference.