Interaction and disorder in bilayer counterflow transport at filling-factor one

2005/04/05 by E. Tutuc, Emanuel Tutuc, M. Shayegan · 2 citations
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.72.081307

published as Phys. Rev. B 72, 081307 (2005) · 4 pages, 3 figures

arxiv created 2005/04/05 · openalex publication_date 2005/08/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study high-mobility, interacting GaAs bilayer hole systems exhibiting counterflow superfluid transport at total filling-factor \ensuremathν=1. As the density of the two layers is reduced, making the bilayer more interacting, the counterflow Hall resistivity (\ensuremathρ_xy) decreases at a given temperature, while the counterflow longitudinal resistivity (\ensuremathρ_xx), which is much larger than \ensuremathρ_xy, hardly depends on density. On the other hand, a small imbalance in the layer densities can result in significant changes in \ensuremathρ_xx at \ensuremathν=1, while \ensuremathρ_xy remains vanishingly small. Our data suggest that the finite \ensuremathρ_xx at \ensuremathν=1 is a result of mobile vortices in the superfluid created by the ubiquitous disorder in this system.

Cited by

• Quantum disordering of the 111 state and the compressible-incompressible transition in quantum Hall bilayer systems
• Scattering theory of transport in coherent quantum Hall bilayers

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