Frictional Drag between Two Dilute Two-Dimensional Hole Layers
arXiv:cond-mat/0202077 · doi:10.1103/PhysRevLett.89.016805
Abstract
We report drag measurements on dilute double layer two-dimensional hole systems in the regime of r_s=19~39. We observed a strong enhancement of the drag over the simple Boltzmann calculations of Coulomb interaction, and deviations from the T^2 dependence which cannot be explained by phonon-mediated, plasmon-enhanced, or disorder-related processes. We suggest that this deviation results from interaction effects in the dilute regime.
4 pages, 3 figures, accepted in Phys. Rev. Lett. Added single layer transport data