Computer Science
Scientific paper
Feb 1950
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1950natur.165..239c&link_type=abstract
Nature, Volume 165, Issue 4189, pp. 239-240 (1950).
Computer Science
15
Scientific paper
AT sufficiently low temperatures and high frequencies, the mean free path of the electrons in a good conductor becomes greater than the classically predicted skin depth, and the classical skin-effect equations break down. Pippard1 has studied the effect at liquid helium and liquid hydrogen temperatures, and Reuter and Sondheimer2 have given the quantitative theory of the effect, and have interpreted Pippard's results. They found that for tin, mercury and aluminium, the experimental results implied reasonable values for the ratio σ/l of conductivity to electronic mean free path, but that for copper, silver and gold they implied values lower than the expected values by a factor of 5 or more. It was suggested that these low values were due to surface conditions differing from those in the bulk metal. In order to study this suggestion and to make a more detailed comparison with the theory than was possible on the basis of Pippard's measurements, a new investigation has been carried out in which attention has been paid to surface conditions, and the whole temperature range from 2° K. to 90° K. has been covered.
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