Which Welsh theoretical physicist and professor emeritus of physics at the University of Cambridge is the discovery of the supercurrent in SNS contacts is sometimes mistakenly attributed to
Proximity effect (superconductivity) Proximity effect or Holm-Meissner effect is a term used in the field of superconductivity to describe phenomena that occur when a superconductor (S) is placed in contact with a "normal" (N) non-superconductor. Typically the critical temperature formula_1 of the superconductor is suppressed and signs of weak superconductivity are observed in the normal material over mesoscopic distances. The proximity effect is known since the pioneering work by R. Holm and W. Meissner. They have observed zero resistance in SNS pressed contacts, in which two superconducting metals are separated by a thin film of a non-superconducting (i.e. normal) metal. The discovery of the supercurrent in SNS contacts is sometimes mistakenly attributed to Brian Josephson's 1962 work, yet the effect was known long before his publication and was understood as the proximity effect.
Michael Barnsley Michael Fielding Barnsley, born in 1946, is a British mathematician, researcher and an entrepreneur who has worked on fractal compression; he holds several patents on the technology. He received his Ph.D in Theoretical Chemistry from University of Wisconsin–Madison in 1972 and BA in Mathematics from Oxford in 1968. In 1987 he founded Iterated Systems Incorporated, and in 1988 he published a book entitled "Fractals Everywhere" and in 2006 "SuperFractals".