Theory of Nuclear Quadrupole Interaction in Nontransition Metals—Magnesium

Abstract

A theoretical investigation of various electronic contributions to the electric field gradient in hcp magnesium has been carried out. The dominant contribution comes from the anisotropic filling of the $\overrightarrow{\mathrm{k}}$ space and is therefore a Fermi-volume effect. In contrast, the contribution associated with the distortion of the Fermi surface by the $l=2\mathrm{}$ component of the lattice potential is found to be extremely small. The total electronic contribution is $0.0046e{a}_0^{-3\mathrm{}}$ and antishields the lattice contribution of $0.0018e{a}_0^{-3\mathrm{}}$.