Evidence for non-linear quasiparticle tunneling between fractional quantum Hall edges
Stefano Roddaro, Vittorio Pellegrini, Fabio Beltram, Giorgio Biasiol, Lucia Sorba, Roberto Raimondi, Giovanni Vignale
Abstract
Remarkable nonlinearities in the differential tunneling conductance between fractional quantum Hall edge states at a constriction are observed in the weak-backscattering regime. In the ν = 1/3 state a peak develops as temperature is increased and its width is determined by the fractional charge. In the range 2/3 ν 1/3 this width displays a symmetric behavior around ν = 1/2. We discuss the consistency of these results with available theoretical predictions for inter-edge quasiparticle tunneling in the weak-backscattering regime.
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