ABSTRACT
As we discussed in Chapter 4, the one-dimensional ordering introduced in the manufacturing process of heterostructures gives rise to novel physical properties (such as the formation of minibands) which re‡ect the long-range, quantum correlation present in these superstructures. In fact, the electronic
in
are determined by both the chemical nature of the materials and the layer thicknesses, so that these structures principle, to tailor their electronic properties at will. In this most appealing motivations for the experimental study of is the theoretical prediction that they should ex-states, associated to highly fragmented fractal energy self-similar patterns (see Sections 5.3 and 5.4).
