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Theory of Electric field Gradient due to Conduction Electron Charge Density Redistribution around Screw Dislocations in Metals
Author(s) -
Ogurtani T. O.,
Huggins R. A.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670240130
Subject(s) - condensed matter physics , redistribution (election) , electric field , charge density wave , electron , thermal conduction , charge density , dislocation , materials science , electric field gradient , copper , conduction electron , fermi level , physics , metallurgy , superconductivity , quantum mechanics , politics , political science , law , composite material
Abstract The 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 k F r + ϕ), where k F 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.