Ab initio analysis of the effect of strain on the density of non-equilibrium electronic states and their role in the wave model of martensitic transformations

In the wave model of martensitic transformations, the influence of the tensile strain on the creation of non-equilibrium electrons is crucial for the principle of wave amplification by stimulated emission of phonons from an inverted electronic population. By consideration of the strain-effect on the electronic energy spectrum it is shown that – for certain interval of finite strain – the density of active electronic non-equilibrium states in a strained lattice can satisfy the conditions for a phonon-maser effect.