2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/22350In a superlattice containing a finite number of periods, the allowed values of the Bloch wave number form a discrete set, and the dynamics of an electron through k-space under the influence of an external force is necessarily that of a superposition wave packet composed of multiple Bloch waves. The present paper investigates this dynamics for a particularly simple class of "k-compact" wave packets, in which the spread over different k-values is minimized, and which propagate with an essentially rigid shape through k-space.PDF File, 14 pages, 2 FiguresMesoscale and Nanoscale PhysicsMaterials Sciencetext