Work

Critical Supercurrents and Self-Organization in Quantum Hall Bilayers

Year: 2010

Type: article

Abstract: We present a theory of interlayer tunneling in a disordered quantum Hall bilayer at total filling factor one, allowing for the effect of static vortices. In agreement with recent experiments [Phys. Rev. B 80, 165120 (2009); Phys. Rev. B 78, 075302 (2008)], we find that the critical current is proportional to the sample area and is comparable in magnitude to observed values. This reflects the formation of a Bean critical state as a result of current injection at the boundary. We predict a crossover to a critical current proportional to the square-root of the area in smaller samples. We also predict a peak in the critical current as the electron density varies at fixed layer separation.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.105.236805

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

Institutions: Trinity College Dublin, University of Cambridge, Imperial College London

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Engineering and Physical Sciences Research Council

Awards: G2359698580, Cambridge Condensed Matter Theory Programme Grant, G5894073734, Counterflow Superfluidity and Tunnelling in Quantum Hall Bilayers