H. Rubel et al., OBSERVATION OF SCREENING IN THE MAGNETO-COULOMB DRAG BETWEEN COUPLED 2-DIMENSIONAL ELECTRON-SYSTEMS, Physical review letters, 78(9), 1997, pp. 1763-1766
The coupling between two spatially separated two-dimensional electron
gases is studied as a function of magnetic field B. We find oscillatio
ns in the transresistivity R(T), which are up to 2 orders of magnitude
enhanced compared to the B = 0 case. R(T) vanishes in the regime of a
quantum Hall plateau and shows a twin-peaked structure in the inter-p
lateau regions. This observation is in good agreement with a recent th
eory by M. C. Bonsager Et al. [Phys. Rev. Lett. 77, 1366 (1996)] who p
redicted a similar behavior caused by the interplay of screening and L
andau quantization.