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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
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.