Breakdown of counterflow superfluidity in a disordered quantum Hall bilayer - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Breakdown of counterflow superfluidity in a disordered quantum Hall bilayer - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present a theory for the regime of coherent interlayer tunneling in adisordered quantum Hall bilayer at total filling factor one, allowing for theeffect of static vortices. We find that the system consists of domains ofpolarized superfluid phase. Injected currents introduce phase slips between thepolarized domains which are pinned by disorder. We present a model of saturatedtunneling domains that predicts a critical current for the breakdown ofcoherent tunneling that is extensive in the system size. This theory issupported by numerical results from a disordered phase model in two dimensions.We also discuss how our picture might be used to interpret experiments in thecounterflow geometry and in two-terminal measurements.



Author: D.K.K. Lee, P.R. Eastham, N.R. Cooper

Source: https://arxiv.org/







Related documents