Direct Observation of a Fractional Charge

Details Direct Observation of a Fractional Charge Direct Observation of a Fractional Charge

1997-07-28

arxiv.org/abs/cond-mat/9707289v1

Nature, v. 389, pp. 162-164 (1997)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, PostScript, 4 figures. Submitted to Nature

Scientific paper

10.1016/S0921-4526(98)00139-2

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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