Frictional Drag Between Coupled 2D Hole Gases in GaAs/AlGaAs Heterostructures

Abstract

We report on the first measurements of the drag effect between coupled 2D-hole gases. We investigate the coupling by changing the carrier densities in the quantum wells, the widths of the barriers between the gases and the perpendicular magnetic field. From the data we are able to attribute the frictional drag to phonon coupling, because the non-parabolicity allows to tune the Fermi wavevector and the Fermi velocity separately and, thereby, to distinguish between phonon- and plasmon-dominated coupling.

10 pages, 5 figures

References in corpus (1)

• Frictional drag between quantum wells mediated by phonon exchange

Cited by in corpus (5)

• Coulomb drag
• Frictional Drag between Two Dilute Two-Dimensional Hole Layers
• Positive and negative Coulomb drag in vertically integrated one-dimensional quantum wires
• Exchange and correlation effects on the plasmon dispersions and the Coulomb drag in low-density electron bilayers
• Quantum solid phase and Coulomb drag in two-dimensional electron-electron bilayers of MoS2