Events in Physics
Alberto Rodriguez, Universidad de Salamanca
Advances in technology have made it possible to manufacture and manipulate systems for which the dimensionality of confinement of electrons is restricted below 3-D. The physics of these low-dimensional systems is unavoidably determined by quantum mechanical effects and particularly the presence of disorder can strongly altered their electronic properties. Our study of the electronic properties of different 1-D models of disordered quantum wires focuses mainly on the structure of the density of states (DOS) in the thermodynamic limit. The presence of disorder apparently induces a fractal structure in the DOS that seems to be related to the discrete character of the distributions defining the disorder: a detailed analysis is presented. Whether this exotic behaviour can also be observed in higher dimensions or its relation with electronic localisation, if any, haven't been studied yet.
In spite of the simplicity of the potential models considered --commonly used as a first approach--we'll see how they can also describe quantitatively certain experimental results.
of talk.