X. G. Feng, S. Zelakiewicz, H. Noh, T. J. Ragucci, T. J. Gramila, L. N. Pfeiffer, K. W. West
Published 1998-09-02Version 1
Electron drag between two two-dimensional electron gases in magnetic fields has been observed with a polarity opposite that for zero field. This negative drag requires that the electrons have a hole-like dispersion. Density dependence measurements in the integer quantum Hall regime show that drag is negative only when the upper Landau level of one layer is more than half filled while the other is less than half filled, indicating that hole-like dispersion is present in a half of each Landau level. Negative drag is argued to be a consequence of disorder.
Comments: 4 pages, 4 figures included, revtex, Accepted for publication in Physical Review Letters
Signature of anyonic statistics in the integer quantum Hall regime
Many-body interactions in a quantum wire in the integer quantum Hall regime: suppression of exchange-enhanced g factor
Multiple Scattering Theory for Two-dimensional Electron Gases in the Presence of Spin-Orbit Coupling
