Fig. 2: Noise data.
From: Observation of ballistic upstream modes at fractional quantum Hall edges of graphene
a and b show the noise detection scheme of the device-1 while the current is injected at contact C and contact A, respectively. c Differential bias response of ν = 2/3 state, where a 100 pA AC signal on top of the DC bias current is injected at contact C and the voltages are measured at contact C (VC) and B (VB) using Lock-In amplifier. d Noise measured along the upstream direction for longer length (10 μm) as shown in Fig. 2a for ν = 1 (brown circles), ν = 1/3 (olive circles) and ν = 2/3 (blue circles). The magenta open circles are the measured noise along the upstream direction for shorter length (4 μm) by reversing the magnetic field (opposite chirality), and injecting current at contact A and measured noise at contact B (see SI, S5). The solid black line is the theoretically calculated noise. e Noise measured along the downstream direction for ν = 2/3 for the scheme shown in Fig. 2b.
