Interaction effects in high‐mobility two‐dimensional electron and hole systems

Abstract

Electron-electron interaction in the presence of impurities is studied in two-dimensional systems where the parameter B k Tt / changes from 0.1 to 10 (t is the momentum relaxation time). This corresponds to the intermediate and ballistic regimes of electron interaction. We analyse the interaction correction to the Drude conductivity in terms of recent theories and show that it is strongly dependent on the character of the impurity potential.