%0 Journal Article %T Observation of the e/3 Fractionally Charged Laughlin Quasiparticles %A L. Saminadayar %A D. C. Glattli %A Y. Jin %A B. Etienne %J Physics %D 1997 %I arXiv %R 10.1103/PhysRevLett.79.2526 %X 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. %U http://arxiv.org/abs/cond-mat/9706307v2