Anomalous Chiral Luttinger Liquid Behavior of Diluted Fractionally Charged Quasiparticles

Details Anomalous Chiral Luttinger Liquid Behavior of Diluted Fractionally Charged Quasiparticles Anomalous Chiral Luttinger Liquid Behavior of Diluted Fractionally Charged Quasiparticles

2003-04-27

arxiv.org/abs/cond-mat/0304610v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to be published on Phys. Rev. B (Rapid Communications)

Scientific paper

10.1103/PhysRevB.67.201104

Fractionally charged quasiparticles in edge states, are expected to condense to a chiral Luttinger liquid (CLL). We studied their condensation by measuring the conductance and shot noise due to an artificial backscatterer embedded in their path. At sufficiently low temperatures backscattering events were found to be strongly correlated, producing a highly non-linear current-voltage characteristic and a non-classical shot noise - both are expected in a CLL. When, however, the impinging beam of quasiparticles was made dilute, either artificially via an additional weak backscatterer or by increasing the temperature, the resultant outgoing noise was classical, indicating the scattering of independent quasiparticles. Here, we study in some detail this surprising crossover from correlated particle behavior to an independent behavior, as function of beam dilution.

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