Deconfinement and Dissipation in Quantum Hall "Josephson" Tunneling

Abstract

The zero-bias tunneling resonance in quantum Hall bilayer systems is investigated via numerical simulations of the classical two dimensional XY model with a symmetry-breaking field. Disorder is included in the model, and is shown to nucleate strings of overturned spins proliferated through the system, with unpaired vortices and antivortices at their endpoints. This string glass state supports low energy excitations which lead to anomalously large dissipation in tunneling, as observed in experiment. The effect of an in-plane magnetic field is discussed.

arXiv comment4 pages, 3 figures. Published version. Animations available at http://www.pa.uky.edu/~fertig/stringglass

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• Coherent Tunneling in Exciton Condensates of Bilayer Quantum Hall Systems
• Quantitative description of Josephson-like tunneling in ${\nu }_T=1$ quantum Hall bilayers
• Area dependence of interlayer tunneling in strongly correlated bilayer 2D electron systems at ${\nu }_T=1$
• Resistance due to vortex motion in the $\nu =1$ bilayer quantum Hall superfluid
• A bosonization approach for bilayer quantum Hall systems at ν_T = 1
• Tunneling at ${\nu }_T=1$ in Quantum Hall Bilayers
• Dissipation and Tunnelling in Quantum Hall Bilayers
• Interaction and disorder in bilayer counterflow transport at filling factor one
• Tunneling, dissipation, and superfluid transition in quantum Hall bilayers
• Quantum and Classical Dissipative Effects on Tunnelling in Quantum Hall Bilayers
• Quantum Hall to Insulator Transition in the Bilayer Quantum Hall Ferromagnet
• Influence of topological excitations on Shapiro steps and microwave dynamical conductance in bilayer exciton condensates
• Bilayer Quantum Hall Ferromagnet in a Periodic Potential
• Noise spectroscopy and interlayer phase-coherence in bilayer quantum Hall systems