Phys. Rev. Lett. 79, 2526–2529 (1997)Observation of the e/3 Fractionally Charged Laughlin QuasiparticleReceived 30 June 1997; published in the issue dated 29 September 1997 The existence of fractional charges carrying current is experimentally demonstrated. Using a 2D electron system in a high perpendicular 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 crossover found for temperature Θ = e*Vds/2kB. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.2526
DOI:
10.1103/PhysRevLett.79.2526
PACS:
73.40.Hm, 05.30.Fk, 71.27.+a, 72.70.+m
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