Thermoelectric power in a disordered two-dimensional electron system

The thermoelectric power $Q$ is studied for a two-dimensional disordered system by using two different models in the weak-scattering limit. The first is a localization theory of noninteracting electrons. No logarithmic divergence is found for $Q$. A second model including the effects of electron-electron interaction gives rise to a logarithmic temperature-dependent term at low temperature. In the present work the effect due to both the long-range and short-range interactions are considered.