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Effect of Alloying on the Fermi Surface of Copper
Phys. Rev. 170, 656 – Published 15 June, 1968
DOI: https://doi.org/10.1103/PhysRev.170.656
Abstract
The variation of neck cross section and of belly/neck ratio with alloy concentration have been measured in a number of rather dilute (<0.1%) alloys of zinc, cadmium, aluminum, nickel, and palladium in copper. The scattering (Dingle) temperatures for neck and belly oscillations in these alloys have also been measured. The results for the nontransitional additives show good agreement with a rigid-band, simple heterovalent scatterer model. The results for a single palladium alloy were inconclusive, but those for the nickel alloys are best interpreted on the basis of Friedel's "virtual bound level" model, with about 0.4 electrons per nickel atom left in the conduction band. The "effective scattering temperature" of nickel for neck electrons in copper is found to be appreciably lower than that for belly electrons, in contrast with the approximate 1.5:1 ratio found for the nontransitional impurities.
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