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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
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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 $2/3 \le ν\le 1/3$ 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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Stefano Roddaro, Vittorio Pellegrini, Fabio Beltram, Giorgio Biasiol, Lucia Sorba, Roberto Raimondi, Giovanni Vignale. 2002-09-04. Evidence for non-linear quasiparticle tunneling between fractional quantum Hall edges. https://doi.org/10.1103/physrevlett.90.046805

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