title: Frictional drag in dilute bilayer 2D hole systems.
abstract: We develop a theory for frictional drag between two 2D hole layers in a dilute bilayer GaAs hole system, including effects of hole-hole and hole-phonon interactions. Our calculations suggest significant enhancement of hole drag transresistivity over the corresponding electron drag results. This enhancement originates from the exchange induced renormalization of the single-layer compressibility and the strong dependence of single-layer conductivity on density. We also address the effect of hole-phonon interaction on the drag temperature dependence. Our calculated results are in reasonable quantitative agreement with recent experimental observations.
authors.affiliation: Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
authors.forename: E H
authors.initials: EH
authors.lastname: Hwang
authors.forename: S Das
authors.initials: SD
authors.lastname: Sarma
authors.forename: V
authors.initials: V
authors.lastname: Braude
authors.forename: Ady
authors.initials: A
authors.lastname: Stern