Abstract
We study the Coulomb drag between two spatially separated electron systems in the quantum Hall regime. At a fixed temperature, the drag is peaked near the transitions between plateaus. The temperature dependence of the drag is a probe of the dynamics of the Hall system in a frequency and wave-vector regime inaccessible to transport measurements in a single layer. Most strikingly, in the transition regions it directly measures an exponent η, discussed by Chalker, that is characteristic of the fractal structure of the critical eigenstates.
Original language | American English |
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Pages (from-to) | 11484-11487 |
Journal | Physical Review B (Condensed Matter and Materials Physics) |
Volume | 49 |
Issue number | 16 |
State | Published - 1994 |
Bibliographical note
Beckman Institute, 405 North Mathews Avenue, Urbana, Illinois 61801Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801