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Direct Observation of a Fractional Charge

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arxiv cond-mat/9707289 v1 pith:MZJHNH33 submitted 1997-07-28 cond-mat.mes-hall

R. de-Picciotto , M. Reznikov , M. Heiblum , V. Umansky , G. Bunin , D. Mahalu This is my paper
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We performed measurements of Quantum Shot Noise in order to determine the quasiparticle charge in the Fractional Quantum Hall regime. The noise is generated by a current flow through a partially transmitting Quantum Point Contact in a 2DEG. The noise is directly proportional to the charge of the quasiparticles, thus allowing direct determination of the charge. We measured Quantum Shot Noise at a filling factor of 1/3 and found that the charge is e/3; as predicted by Laughlin.

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  1. Anyon delocalization transitions out of a disordered FQAH insulator

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    A theory predicts that doping a ν=2/3 fractional quantum anomalous Hall insulator with charge-2/3 anyons can drive a direct transition to a chiral topological superconductor, with a universal resistance peak, while ch...

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