This dissertation demonstrates the behavior of the electronic
transport properties in the presence of a temperature gradient in
disordered systems near the metal-insulator transition. In
particular, we first determine the d.c. conductivity, the
thermopower, the thermal conductivity, the Lorenz number, the figure
of merit, and the specific heat of a three-dimensional Anderson model
of localization by two phenomenological approaches. Then we also compute
the d.c. conductivity, the localization length and the Peltier
coefficient in one dimension by a new microscopic approach based on
the recursive Green's functions method. A fully analytic study is
difficult, if not impossible, due to the problem of treating the
intrinsic disorder in the model, as well as, incorporating a
temperature gradient in the Hamiltonian. Therefore, we resort to
various numerical methods to investigate the problem.
Freie Schlagwörter
undgeordnete Systeme
rekursive Green-Funktionsmethode
Klassifikation (DDC)
530
Normschlagwörter (GND)
Metall-Isolator-Phasenumwandlung
Anderson-Lokalisation
Thermokraft
Elektrische Leitfähigkeit
Amorpher Festkörper
Den akademischen Grad verleihende / prüfende Institution