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Daniel C. Tsui To Share 1998 Nobel Prize in
Physics. Daniel Chee Tsui, Arthur Legrand Doty
Professor of Electrical Engineering, on Tuesday has
won the 1998 Nobel Prize in Physics for his 1982
discovery with co-winner Horst L. Stormer, now of
Columbia University, of the fractional quantum Hall
effect. A third co-winner, Robert B. Laughlin,
explained their result the following year. The
experiments by Tsui and Stormer led to Laughlin's
finding that the electrons in a powerful magnetic
field can form a quantum fluid, in which "parts" of
an electron can be identified.
Tsui's work stems from a 1879
finding by a student, Edwin H. Hall, who discovered
a pattern in the flow of electric current when a
gold plate is placed in a magnetic field at right
angles to its surface. The current flowing along
the plate would drop at right angles. This
phenomenon, termed the Hall effect, can be used to
determine the density of charge carriers in
conductors and semiconductors and is a standard
tool in physics laboratories.
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