Super Poissonian noise in the FQHE regime

We present shot noise measurements in the fractional quantum Hall regime at ν=13 when the fractional edges are weakly coupled by an artificial impurity, namely a quantum point contact. At low voltage, when the weak coupling is renormalized by the interaction and leads to strong backscattering, shot noise measurements show super Poissonian shot noise with a charge close to 2e or even above.