Observation of Quantized Hall Drag in a Strongly Correlated Bilayer Electron System
M. Kellogg, I.B. Spielman, J.P. Eisenstein, L.N. Pfeiffer, K.W. West
Abstract
The frictional drag between parallel two-dimensional electron systems has been measured in a regime of strong interlayer correlations. When the bilayer system enters the excitonic quantized Hall state at total Landau level filling factor \nu_T=1 the longitudinal component of the drag vanishes but a strong Hall component develops. The Hall drag resistance is observed to be accurately quantized at h/e^2.