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Nobel Prizes and Laureates

Nobel Prizes and Laureates

The Nobel Prize in Physics 1973
Leo Esaki, Ivar Giaever, Brian D. Josephson

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Brian D. Josephson - Facts

Brian David Josephson

Brian David Josephson

Born: 4 January 1940, Cardiff, United Kingdom

Affiliation at the time of the award: University of Cambridge, Cambridge, United Kingdom

Prize motivation: "for his theoretical predictions of the properties of a supercurrent through a tunnel barrier, in particular those phenomena which are generally known as the Josephson effects"

Field: condensed matter physics, semiconductors

Prize share: 1/2

Work

In quantum physics matter is described as both waves and particles. One result of this is the tunneling phenomenon, which means that particles can pass through barriers that they should not be able to squeeze through according to classic physics. In 1962 Brian Josephson predicted unexpected results with superconductors, material that at low temperatures lacks electrical resistance. Without superimposed voltage, a current can result between two superconductors that are separated by a thin insulator. If a rectified voltage is added, on the other hand, an alternating current can result.

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