Abstract
The effect of tunneling on the transport properties of quantum Hall double layers in the regime of the excitonic condensate at a total filling factor one is studied in counterflow experiments. If the tunnel current is smaller than a critical , tunneling is large and is effectively shorting the two layers. For tunneling becomes negligible. Surprisingly, the transition between the two tunneling regimes has only a minor impact on the features of the filling-factor one state as observed in magnetotransport, but at currents exceeding the resistance along the layers increases rapidly.
- Received 15 December 2009
DOI:https://doi.org/10.1103/PhysRevLett.104.116802
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