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Observation of the e/3 Fractionally Charged Laughlin Quasiparticles

L. Saminadayar·D. C. Glattli·Y. Jin·B. Etienne
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Abstract

The existence of fractional charges carrying the current is experimentally demonstrated. Using a 2-D electron system in high magnetic field, we measure the shot noise associated with tunneling in the fractional quantum Hall regime at Landau level filling factor 1/3. The noise gives a direct determination of the quasiparticle charge, which is found to be e*=e/3 as predicted by Laughlin. The existence of e/3 Laughlin quasiparticles is unambiguously confirmed by the shot noise to Johnson-Nyquist noise cross-over found for temperature e*V/2k.

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L. Saminadayar, D. C. Glattli, Y. Jin, B. Etienne. 1997-09-04. Observation of the e/3 Fractionally Charged Laughlin Quasiparticles. https://doi.org/10.1103/physrevlett.79.2526

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