Weak Localization, Hole-Hole Interactions, and the “Metal”-Insulator Transition in Two Dimensions
Weak Localization, Hole-Hole Interactions, and the “Metal”-Insulator Transition in Two Dimensions
A detailed investigation of the metallic behavior in high-quality GaAs-AlGaAs two-dimensional hole systems reveals the presence of quantum corrections to the resistivity at low temperatures. Despite the low density ( r(s)>10) and high quality of these systems, both weak localization (observed via negative magnetoresistance) and weak hole-hole interactions (giving a …