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Journal Article

Coupling of Josephson Currents in Quantum Hall Bilayers

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Dietsche,  W.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Hauser,  M.
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;

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von Klitzing,  K.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Huang, X., Dietsche, W., Hauser, M., & von Klitzing, K. (2012). Coupling of Josephson Currents in Quantum Hall Bilayers. Physical Review Letters, 109(15): 156802.


Cite as: https://hdl.handle.net/21.11116/0000-000E-C5A1-D
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 Bardeen-Cooper-Schriefferlike 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. Because of the large electric resistance between the two edges, the interaction between them can only be mediated by the neutral interlayer excitonic ground state.