Pairs of inversely occupied electronic states in the energy range best suited to wave generation

For a model electronic spectrum of a bcc crystal, characteristic s-surfaces are found that separate, in the quasi-momentum space, pairs of electronic states potentially active in the generation of elastic waves at the stage of growth of a martensite crystal. Numerical estimation of the fraction of active electronic states (R_eff/R) is performed for the energy range Δ = 0.2 eV near the Fermi level. The ratio R_eff/R is calculated as a function of the parameter ratio for the interaction between the nearest and the second neighbors for both bcc and fcc lattices. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 44–48, November, 2005.