The Quantum Hall Effect in Drag: Inter-layer Friction in Strong Magnetic Fields

Details The Quantum Hall Effect in Drag: Inter-layer Friction in Strong Magnetic Fields The Quantum Hall Effect in Drag: Inter-layer Friction in Strong Magnetic Fields

1993-11-23

arxiv.org/abs/cond-mat/9311053v1

Physics

Condensed Matter

13 pages, Revtex 2.0, 1 figure upon request, P-93-11-093

Scientific paper

10.1103/PhysRevB.49.11484

We study the Coulomb drag between two spatially separated electron systems in a strong magnetic field, one of which exhibits the quantum Hall effect. At a fixed temperature, the drag mimics the behavior of $\sigma_{xx}$ in the quantum Hall system, in that it is sharply peaked near the transitions between neighboring plateaux. We assess the impact of critical fluctuations near the transitions, and find that the low temperature behavior of the drag measures an exponent $\eta$ that characterizes anomalous low frequency dissipation; the latter is believed to be present following the work of Chalker.

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