Coupling of Josephson Currents in Quantum Hall Bilayers

Abstract

We study ring shaped (Corbino) devices made of bilayer two-dimensional electron gases in the total filling factor one quantized Hall phase which is considered to be a coherent BCS-like state of interlayer excitons. Identical Josephson currents are observed at the two edges while only a negligible conductance between them is found. The maximum Josephson current observed at either edge can be controlled by passing a second interlayer Josephson current at the other edge. Due to the large electric resistance between the two edges, the interaction between them can only be mediated by the neutral interlayer excitonic groundstate.

References in corpus (6)

• Critical tunneling currents in the regime of bilayer excitons
• Exciton condensate at a total filling factor of 1 in Corbino 2D electron bilayers
• Dominant parameters for the critical tunneling current in bilayer exciton condensates
• Coherent Tunneling in Exciton Condensates of Bilayer Quantum Hall Systems
• Area dependence of interlayer tunneling in strongly correlated bilayer 2D electron systems at ${\nu }_T=1$
• Critical currents and self organization in quantum Hall bilayers

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