Abstract

AbstractThe electric field gradient due to conduction electron charge density redistribution around screw dislocations in metals is calculated. It is found that the electric field gradient behaves as r−5/2 cos(2 kF r + ϕ), where kF is the Fermi wave number and ϕ is the phase. The Bloch enhancement factor is computed using the orthogonalized plane wave procedure, and is found to be 7.62 for a screw dislocation in copper. These results are in agreement with nuclear magnetic resonance experiments in plastically deformed copper.

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