Effect of uniaxial deformation on the number of pairs of inversely populated electronic states

Abstract

Simple electronic spectra are considered in the tight-binding approximation for the case of uniform uniaxial deformation. It is shown that there is a range of deformations (considerably exceeding a threshold one) in which conditions for the generation of phonons by nonequilibrium electrons are satisfied. Moreover, in this range an increase in the deformation is accompanied by an increase in the number of pairs of potentially active electronic states. The effect is pronounced more strongly in the case of tensile deformation. The results obtained are important for the development of the theory of reconstructive martensitic transformations. © 2008 Pleiades Publishing, Ltd.