Confinement of fractional quantum Hall states in narrow conducting channels

Details Confinement of fractional quantum Hall states in narrow conducting channels Confinement of fractional quantum Hall states in narrow conducting channels

2007-03-08

arxiv.org/abs/cond-mat/0703197v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.2762299

Confinement of small-gapped fractional quantum Hall states facilitates quasiparticle manipulation and is an important step towards quasiparticle interference measurements. Demonstrated here is conduction through top gate defined, narrow channels in high density, ultra-high mobility heterostructures. Transport evidence for the persistence of a correlated state at filling fraction 5/3 is shown in channels of 2micron length but gated to near 0.3micron in width. The methods employed to achieve this confinement hold promise for interference devices proposed for studying potential non-Abelian statistics at filling fraction 5/2.

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