Frictional Drag between Two Dilute Two-Dimensional Hole Layers
R. Pillarisetty, Hwayong Noh, D. C. Tsui, E. P. De Poortere, E. Tutuc, M. Shayegan
Abstract
We report drag measurements on dilute double layer two-dimensional hole systems in the regime of rs=19~39. We observed a strong enhancement of the drag over the simple Boltzmann calculations of Coulomb interaction, and deviations from the T2 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.
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