Transport in Coherent Quantum Hall Bilayers

Abstract

We discuss two phenomenological descriptions of low-current transport in bilayer quantum Hall system with exciton condensates, one based on a Landauer-Buttiker description of Andreev scattering at contacts to coherent bilayers and one based on a simplified single-parameter {\em p-ology} description of the weak to strong interlayer coupling crossover. The Andreev scattering phenomenology in intended to apply when the condensate is well developed and is used to predict current-voltage relationships for a variety of two contact geometries. We also apply this formalism to circumstances in which the tunnel current exceeds its critical value and the condensate is time-dependent. The {\em p-ology} approach is used to establish the universal development of large longitudinal drags, even in homogenous coherent samples, as the condensate weakens and the Hall drag is reduced.

13 pages, 3 figures

References in corpus (9)

• Critical tunneling currents in the regime of bilayer excitons
• Exciton condensate at a total filling factor of 1 in Corbino 2D electron bilayers
• Evidence for a finite temperature phase transition in a bilayer quantum Hall system
• Interlayer Transport in Bilayer Quantum Hall Systems
• Dominant parameters for the critical tunneling current in bilayer exciton condensates
• Area dependence of interlayer tunneling in strongly correlated bilayer 2D electron systems at ${\nu }_T=1$
• Theory of Activated Transport in Bilayer Quantum Hall Systems
• Interaction and disorder in bilayer counterflow transport at filling factor one
• Critical currents and self organization in quantum Hall bilayers

Cited by in corpus (9)

• Coulomb drag
• Exciton Condensation and Perfect Coulomb Drag
• Spatially-indirect Exciton Condensate Phases in Double Bilayer Graphene
• Tunneling at ${\nu }_T=1$ in Quantum Hall Bilayers
• Drag effect and Cooper electron-hole pair fluctuations in a topological insulator film
• Fluctuational internal Josephson effect in topological insulator film
• Nanotransformation and current fluctuations in exciton condensate junctions
• Diamagnetism and flux creep in bilayer exciton superfluids
• Coherent edge mixing and interferometry in quantum Hall bilayers