Vanishing Hall Resistance at High Magnetic Field in a Double Layer Two-Dimensional Electron System

Details Vanishing Hall Resistance at High Magnetic Field in a Double Layer Two-Dimensional Electron System Vanishing Hall Resistance at High Magnetic Field in a Double Layer Two-Dimensional Electron System

2004-01-26

arxiv.org/abs/cond-mat/0401521v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.93.036801

At total Landau level filling factor $\nu_{tot}=1$ a double layer two-dimensional electron system with small interlayer separation supports a collective state possessing spontaneous interlayer phase coherence. This state exhibits the quantized Hall effect when equal electrical currents flow in parallel through the two layers. In contrast, if the currents in the two layers are equal, but oppositely directed, both the longitudinal and Hall resistances of each layer vanish in the low temperature limit. This finding supports the prediction that the ground state at $\nu_{tot}=1$ is an excitonic superfluid.

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