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Effect of Alloying on the Fermi Surface of Copper

L.-F. Chollet* and I. M. Templeton

  • National Research Council, Ottawa, Canada

  • *National Research Council of Canada Postdoctorate Fellow. Present address: Laboratoire Suisse de Recherches Horlogères, Neuchâtel, Switzerland.

Phys. Rev. 170, 656 – Published 15 June, 1968

DOI: https://doi.org/10.1103/PhysRev.170.656

Abstract

The variation of 111 neck cross section and of 111 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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