2010/03/30 by D. V. Fil, S. I. Shevchenko · 6 citations
Physics and Astronomy · #Coherence (philosophical gambling strategy) #Coherence length #Composite fermion #Condensed matter physics #Drag #Electrical resistivity and conductivity #Electron #Hall effect #Mechanics #Phenomenological model #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Semiconductor Quantum Structures and Devices #Superconductivity #Supercurrent #Vortex #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1016/j.physleta.2010.06.004
published in Physics Letters A 374(33), 3335-3340 (Elsevier BV)
arxiv created 2010/03/30 · openalex publication_date 2010/06/10 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a phenomenological model that describes counterflow and drag experiments with quantum Hall bilayers in a νT=1 state. We consider the system consisting of statistically distributed areas with local total filling factors νT1>1 and νT2<1. The excess or deficit of electrons in a given area results in an appearance of vortex excitations. The vortices in quantum Hall bilayers are charged. They are responsible for a decay of the exciton supercurrent, and, at the same time, contribute to the conductivity directly. The experimental temperature dependence of the counterflow and drive resistivities is described under accounting viscous forces applied to vortices that are the exponentially increase functions of the inverse temperature. The presence of defect areas where the interlayer phase coherence is destroyed completely can result in an essential negative longitudinal drag resistivity as well as in a counterflow Hall resistivity.