# Direct observation of a fractional charge

@article{dePicciotto1997DirectOO, title={Direct observation of a fractional charge}, author={R. de-Picciotto and M. Reznikov and Moty Heiblum and Vladimir I. Umansky and Gregory Bunin and Diana Mahalu}, journal={Nature}, year={1997}, volume={389}, pages={162-164} }

Since Millikan's famous oil-drop experiments, it has been well known that electrical charge is quantized in units of the charge of an electron, e. For this reason, the theoretical prediction, by Laughlin of the existence of fractionally charged ‘quasiparticles’—proposed as an explanation for the fractional quantum Hall (FQH) effect—is very counterintuitive. The FQH effect is a phenomenon observed in the conduction properties of a two-dimensional electron gas subjected to a strong perpendicular… Expand

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