Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire

P. Roche , J. Segala , D. C. Glattli , J. T. Nicholls , M. Pepper , A. C. Graham , K. J. Thomas , M. Y. Simmons

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D. A. Ritchie

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classification ❄️ cond-mat.mes-hall

keywords structurefactorfanowireadditionalassociatedballisticballisticone-dimensional

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We have measured the non-equilibrium current noise in a ballisticone-dimensional wire which exhibits an additional conductanceplateau at $0.7\times2e^2/h$. The Fano factor shows a clearreduction on the 0.7 structure, and eventually vanishes uponapplying a strong parallel magnetic field. These results provideexperimental evidence that the 0.7 structure is associated withtwo conduction channels which have different transmissionprobabilities.

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Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire

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