ZhETF, Vol. 148,
p. 573 (September 2015)
(English translation - JETP,
Vol. 121, No. 3,
available online at www.springer.com
NONEQUILIBRIUM KINETICS OF THE ELECTRON-PHONON SUBSYSTEM OF A CRYSTAL IN A STRONG ELECTRIC FIELD AS A BASE OF THE ELECTROPLASTIC EFFECT
Karas V.I., Vlasenko A.M., Sokolenko V.I., Zakharov V.E.
Received: December 25, 2014
We present the results of a kinetic analysis of nonequilibrium dynamics of the electron-phonon system of a crystal in a strong electric field based on the proposed method of numerically solving a set of Boltzmann equations for electron and phonon distribution functions without expanding the electron distribution function in a series in the phonon energy. It is shown that the electric field action excites the electron subsystem, which by transferring energy to the phonon subsystem creates a large amount of short-wave phonons that effectively influence the lattice defects (point, lines, boundaries of different phases), which results in a redistribution of and decrease in the lattice defect density, in damage healing, in a decrease in the local peak stress, and a decrease in the degradation level of the construction material properties.