Direct observation of a fractional charge

1997/07/28 by R. de-Picciotto, R de-Picciotto, M. Reznikov +9 · 5 citations
Chemistry · Engineering · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1016/s0921-4526(98)00139-2

published as Nature, v. 389, pp. 162-164 (1997) · 3 pages, PostScript, 4 figures. Submitted to Nature

arxiv created 1997/07/28 · openalex publication_date 1998/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29

Abstract

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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