Metallic behavior in low-disorder two-dimensional hole systems in the presence of long- and short-range disorder

Abstract: We compare directly the metallic behavior of high-quality, two-dimensional hole systems (2DHSs) in two GaAs device structures—one dominated by short-range disorder and the other by long-range disorder. We find that the type of disorder strongly affects the metallic behavior of the 2DHSs. In particular, we find that metallic behavior is enhanced in 2D systems with a high proportion of large-angle scattering events. [Copyright &y& Elsevier]