Figure 3

For etched sample A, (a) I–V curves at various temperatures from 60 mK to 3 K for μ₀H = 5 mT. (b) VG scaling of the I–V curves in (a). (c) I–V characteristics measured at 0.5 K for magnetic fields ranging from 0 to 40 mT. (d) VG scaling of the I–V curves in (c).