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- W2006182803 abstract "Measurements have been made of the temperature dependence of the attenuation of longitudinal ultrasound in the superconducting states of pure zinc and cadmium for propagation along the and <0001>, <101 ¯ 0> and <112 ¯ 0> directions, at frequencies from 40 to 160 MHz. This temperature dependence has been interpreted in terms of an energy gap parameter A = 2∆(0)/ kT c . In zinc, for T < ½ T c , A was found to be 3.41 ± 0.1, 3.79 ± 0.1 and 3.64 ± 0.1 for the <0001>, <101 ¯ 0> and <122 ¯ 0> directions respectively. The corresponding values for cadmium were 3.29 ± 0.1, 2.80 ± 0.1 and 3.87 ± 0.1. A simple model proposed by Hays for the distribution of the energy gaps on the Fermi surface of zinc does not explain these results, and a more realistic model has been proposed. The main features of the proposed energy-gap distributions in zinc and cadmium are that the electrons on the third band lens have larger energy gaps than those on the second band monster, over which there is a large and complicated variation." @default.
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- W2006182803 date "1973-09-18" @default.
- W2006182803 modified "2023-09-28" @default.
- W2006182803 title "Ultrasonic studies of the electronic structure of hexagonal metal crystals II. Superconducting state in zinc and cadmium" @default.
- W2006182803 cites W1994116905 @default.
- W2006182803 cites W2001972187 @default.
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- W2006182803 doi "https://doi.org/10.1098/rspa.1973.0098" @default.
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