Quadrupole Interaction of Nuclei with Conduction Electrons

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Abstract
The nuclear spin‐lattice relaxation time in metals is calculated taking into account the following three interactions between the nuclei and the conductions electrons: (1) the usual contact part of the hyperfine interaction, which is the dominant mechanism; (2) the noncontact part of the hyperfine interaction; (3) the quadrupole interaction for nuclei of spin I≥1. It is found that the latter two interactions are of the same order of magnitude. If the electronic wave function at the Fermi surface has a p‐wave component comparable with its s‐wave component, these two mechanisms may appreciably shorten the relaxation time as calculated using only the contact part of the hyperfine interaction.

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