The Norwegian-born condensed-matter physicist Ivar Giaever, who shared the Nobel Prize for Physics in 1973, died on 20 June at the age of 96. In the late 1950s, Giaever made pioneering progress in the electron tunnelling in superconductors as well as provided a crucial verification of the Bardeen–Cooper–Schrieffer (BCS) theory of superconductivity.
Born in Bergen, Norway, on 5 April 1929, Giaever graduated with a degree in mechanical engineering in 1952 from the Norwegian Institute of Technology. Following a year of military service he worked as a patent examiner for the Norwegian government before moving to Canada in 1954 where he began working at General Electric.
Two years later he moved to GE’s research laboratory in New York, where he continued to study the company’s engineering courses. In 1958 he joined the GE’s R&D centre as a researcher.
At the same time, Giaever began to study physics at Rensselaer Polytechnic Institute in New York where he obtained a PhD in 1964 working in tunnelling and superconductivity. That year he also became a naturalized US citizen.
A Nobel life
It was work in the early 1960s that led to his Nobel prize. Following the Japanese physicist Leo Esaki’s discovery of electron tunnelling in semiconductors in 1958, Giaever showed that tunnelling also happened in superconductors, in this case a thin later of oxide surrounded by a metal in a superconducting state.
Using his tunnelling apparatus, Giaever also measured the energy gap near the Fermi level when a metal becomes superconducting, providing crucial verification of the BCS theory of superconductivity.
At the age of 44, Giaever shared half the 1973 Nobel Prize for Physics with Esaki “for their experimental discoveries regarding tunnelling phenomena in semiconductors and superconductors, respectively”. The other half went to Brian Josephson “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”.
In 1988 Giaever left General Electric and moved to Rensselaer where he continued to work in biophysics. In 1993, he founded the New York-based Applied BioPhysics Inc.
As well as the Nobel prize, Giaever also won the Oliver E Buckley Prize by the American Physical Society (APS) in 1965 as well as the Golden Plate Award by the American Academy of Achievement in 1966.
Gaiever’s career was not withouth controversy. In 2011 he resigned from the APS in protest after the organisation called the evidence of damaging global warming “incontrovertible”.
In 2016 he published his autobiography I am the Smartest Man I Know, in which he details his journey from relatively humble beginnings in Norway to a Nobel prize and beyond.
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