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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·D. A. Ritchie
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Abstract

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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P. Roche, J. Segala, D. C. Glattli, J. T. Nicholls, M. Pepper, A. C. Graham, K. J. Thomas, M. Y. Simmons, D. A. Ritchie. 2004-05-06. Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire. https://doi.org/10.1103/physrevlett.93.116602

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