Effect of Spin Fluctuations on the Electric Field Gradient in Itinerant Electron Magnets

Abstract
The effect of spin fluctuations on the electric field gradients at nuclear sites in itinerant electron magnets is studied by using the self-consistent renormalization theory. The coupling between the quadrupole charge density and the spin density fluctuation modes is shown to lead to a significant temperature dependence of the nuclear quadrupole coupling constant as was observed recently in MnSi.

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