Interaction correction to the longitudinal conductivity and hall resistivity in high quality two-dimensional GaAs electron and hole systems

Full text: The origin of the anomalous metallic behaviour in high quality two-dimensional (2D) systems at low temperature remains controversial, as theory suggests that 2D metallic Fermi liquids should not exist. We have performed a systematic study of the quantum mechanical corrections to the longitudinal conductivity and Hall resistivity in high quality GaAs electron and hole systems. We demonstrate that both corrections are consistent with a recent finite-temperature Fermi-liquid based theory by ZaIa et a/.. Our results suggest that the observed metallic behaviour is due to electron-electron interactions and screening of ionised impurity scattering, ruling out some of the more exotic explanations. Copyright (2005) Australian Institute of Physics