Enhancement of Coulomb drag away from half filled Landau levels

Details Enhancement of Coulomb drag away from half filled Landau levels Enhancement of Coulomb drag away from half filled Landau levels

1999-09-15

arxiv.org/abs/cond-mat/9909231v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, to appear in the proceedings of Physical Phenomena at High Magnetic Fields III (October 23-27, 1998)

Scientific paper

Coulomb drag between two parallel two dimensional electron gases has been measured at high magnetic fields in samples with two different layer spacings. As the layer filling factor deviates from nu=1/2, we find that the magnitude of the drag is enhanced quadratically with Delta nu = nu - 1/2, and the curvature of the enhancement is insensitive to both the sign of Delta nu and the spacing between the layers. Our results suggest that the enhancement is not due to non-perturbative interlayer correlations.

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