Area dependence of interlayer tunneling in strongly correlated bilayer 2D electron systems at ${\nu }_T=1$

Abstract

The area and perimeter dependence of the Josephson-like interlayer tunneling signature of the coherent ${\nu }_T=1$ quantum Hall phase in bilayer two-dimensional electron systems is examined. Electrostatic top gates of various sizes and shapes are used to locally define distinct ${\nu }_T=1$ regions in the same sample. Near the phase boundary with the incoherent ${\nu }_T=1$ state at large layer separation, our results demonstrate that the tunneling conductance in the coherent phase is closely proportional to the total area of the tunneling region. This implies that tunneling at ${\nu }_T=1$ is a bulk phenomenon in this regime.

5 pages, 3 postscript figures

References in corpus (5)

• Evidence for a finite temperature phase transition in a bilayer quantum Hall system
• Interlayer Transport in Bilayer Quantum Hall Systems
• Coherent Tunneling in Exciton Condensates of Bilayer Quantum Hall Systems
• Dissipation and Tunnelling in Quantum Hall Bilayers
• Quantum and Classical Dissipative Effects on Tunnelling in Quantum Hall Bilayers

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• Influence of topological excitations on Shapiro steps and microwave dynamical conductance in bilayer exciton condensates
• Interplay between the coherent and incoherent transport in quantum Hall bilayers