Fig. 3: Characteristics of charge transport.
From: Quantized charge fractionalization at quantum Hall Y junctions in the disorder dominated regime
a, d Vg-dependence of two-terminal conductance G measured with ohmic contacts Ω1 and Ω2 of device #2 obtained at νB = 2/3 in a and νB = 1 in d. The insets show the channel configurations, where multiple charge fractionalizations at Y-junctions explain the plateau G = e2/6 h at νG = 1 in a and G = e2/3 h at νG = 2 in d. b, e The reference charge qt, and fractionalized charges qf1, qf2, and qf3 in the respective packets normalized by qt. A single reference packet typically involves qt \(\cong\) 240e in b and 30e in e. The clear plateaus of qf/qt indicate the quantized fractionalization. The insets show fractionalization factor r = qf2/qf1 with a constant region (r = 0.34 ± 0.03 in b and r = 0.49 ± 0.03 in e). c, f Charge velocities of the channels. The Δν = 1/3 interface channel between ν = 1 and 2/3 regions, the Δν = 1 edge channel between νG = 1 and vacuum, and the Δν = 2/3 composite channel between νG = 0 and νB = 2/3 are shown in c, whereas the Δν = 1 interface channel between νG = 2 and νB = 1 regions (0.3 V < Vg < 0.4 V, estimated from the second and the third packets), the Δν = 1 edge channel between νG = 1 and vacuum (Vg < 0.18 V), and the Δν = 2 composite channel between νG = 2 and vacuum are shown in f. Data in b, c, e, and f were obtained using device #1. Vertical dotted lines for representative νG values were determined from a separate four-terminal measurement (see Supplementary Note 1).
