Osheroff, Douglas D.


Osheroff, Douglas D.

▪ American physicist
in full  Douglas Dean Osheroff  
born Aug. 1, 1945, Aberdeen, Wash., U.S.

      American physicist who, along with David Lee (Lee, David M.) and Robert Richardson (Richardson, Robert C.), was the corecipient of the 1996 Nobel Prize for Physics for their discovery of superfluidity in the isotope helium-3.

      Osheroff received a bachelor's degree (1967) from the California Institute of Technology and a doctorate (1973) from Cornell University in Ithaca, N.Y. He was a graduate student working with Lee and Richardson in the low-temperature laboratory at Cornell when the team made its discovery in 1972. The team was investigating the properties of helium-3 under temperatures of just a few thousandths of a degree above absolute zero (−273° C). Osheroff noticed minute jumps in the internal pressure of the sample of helium-3 under investigation, and he drew the team's attention to these small deviations. The researchers eventually concluded that the helium-3 had undergone a phase transition to a superfluid state, in which a liquid's atoms lose their randomness and move about in a coordinated manner. Such a substance lacks all internal friction, flows without resistance, and behaves according to quantum mechanical laws rather than to those of classical fluid mechanics. The discovery of superfluidity in helium-3 enabled scientists to study directly in macroscopic—or visible—systems the quantum mechanical effects that had previously been studied only indirectly in molecules, atoms, and subatomic particles.

      Osheroff conducted research at Bell Telephone Laboratories from 1972 to 1982 and headed solid-state and low-temperature research there from 1982 to 1987. He became a professor at Stanford University (Calif.) in 1987.

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Universalium. 2010.

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