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Electric Current Effect on Metal Surface Layers
Author(s) -
Roshchupkin A. M.,
Bataronov I. L.,
Troitskii O. A.,
Moiseenko M. M.
Publication year - 1989
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.2221510114
Subject(s) - current (fluid) , current density , condensed matter physics , materials science , metal , electric current , surface layer , thermal diffusivity , electron , surface (topology) , deformation (meteorology) , mean free path , layer (electronics) , mechanics , thermodynamics , physics , composite material , metallurgy , geometry , mathematics , quantum mechanics
The electric current hydrodynamic effect on the metal surface layers due to the electronic liquid braking by the metal surface is considered in terms of the diffusivity parameter approximation. The relation between the coefficient of the electronic liquid kinematik friction against the surface and the parameter is obtained. It is shown that when current flows, in the near‐surface layer of the order of about the mean electron free path length the mechanical stresses ≈ p F j / e arise, where p F stands for the Fermi momentum, j for the current density in the metal, e for the electron charge. It is noted that under the conditions of electroplastic deformation these stresses amount to a fairly significant value and can stimulate the dislocational processes in the nearsurface layer of metal.