Breakdown of counterflow superfluidity in a disordered quantum Hall bilayer
Citation:
D. K. K. Lee, P. R. Eastham and N. R. Cooper, Breakdown of counterflow superfluidity in a disordered quantum Hall bilayer, Advances in Condensed Matter Physics, 2011, 2011, 792125Download Item:
Breakdown.pdf (Published (author's copy) - Peer Reviewed) 209.2Kb
Abstract:
We present a theory for the regime of coherent interlayer tunneling in a disordered quantum Hall
bilayer at total filling factor one, allowing for the effect of static vortices. We find that the system
consists of domains of polarized superfluid phase. Injected currents introduce phase slips between
the polarized domains which are pinned by disorder. We present a model of saturated tunneling
domains that predicts a critical current for the breakdown of coherent tunneling that is extensive
in the system size. This theory is supported by numerical results from a disordered phase model
in two dimensions. We also discuss how our picture might be used to interpret experiments in the
counterflow geometry and in two-terminal measurements.
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Science Foundation Ireland (SFI)
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http://people.tcd.ie/easthampDescription:
PUBLISHED
Author: EASTHAM, PAUL
Sponsor:
Science Foundation Ireland (SFI)Type of material:
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Advances in Condensed Matter Physics2011
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Nanoscience & MaterialsThe following license files are associated with this item: