Dissipationless transport in low density bilayer systems

Preprint

17 August 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9908251

Abstract

In a bilayer electronic system the layer index may be viewed as the z-component of an isospin-1/2. An XY isospin-ordered ferromagnetic phase was observed in quantum Hall systems and is predicted to exist at zero magnetic field at low density. This phase is a superfluid for opposite currents in the two layers. At B=0 the system is gapless but superfluidity is not destroyed by weak disorder. In the quantum Hall case, weak disorder generates a random gauge field which probably does not destroy superfluidity. Experimental signatures include Coulomb drag and collective mode measurements.

Keywords

DISSIPATIONLESS TRANSPORT
BILAYER SYSTEMS
DENSITY BILAYER
WEAK DISORDER
SUPERFLUIDITY
FERROMAGNETIC
QUANTUM HALL
COULOMB

All Related Versions

Version 1, 1999-08-17, ArXiv
Published version: Physical Review Letters, 84 (1), 139.

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