Theory of Tunneling in the Exciton Condensate of Bilayer Quantum Hall Systems

Details Theory of Tunneling in the Exciton Condensate of Bilayer Quantum Hall Systems Theory of Tunneling in the Exciton Condensate of Bilayer Quantum Hall Systems

2004-07-20

arxiv.org/abs/cond-mat/0407535v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

We develop a theory of interlayer tunneling in the exciton condensate of bilayer quantum Hall systems, which predicts strongly enhanced, but finite, tunneling conductance peaks near zero bias even at zero temperature. It is emphasized that, though this strongly enhanced tunneling originates from spontaneous interlayer phase coherence, it is fundamentally not the Josephson effect. Because of strong interlayer correlation, the bilayer system behaves as a single system so that conventional tunneling theories treating two layers as independent systems are not applicable. Based on our theory, we compute the height of conductance peak as a function of interlayer distance, which is in good agreement with experiment.

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