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Statistics of quantum transport in metal nanowires with surface disorder

J. Burki·C. A. Stafford
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Abstract

Experimental conductance histograms built from several thousand successive breakings of sodium nanowires exhibit peaks up to rather high conductance values (100 x 2e^2/h). In this paper, we present results from a disordered free-electron model of a metallic nanowire, which was previously successful in describing both conductance histograms and shot noise measurements in gold nanocontacts with much lower conductances. We find in particular that, with a modification of the model of disorder, the conductance histogram can be understood as an interplay of conductance quantization and disorder for low conductances (G < 10 x 2e^2/h), while peaks corresponding to higher conductance are actually a combination of several ``quantized conductance peaks''. We also predict a saturation of the shot noise at high conductance to about 1/10 of its classical value 2eI.

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J. Burki, C. A. Stafford. 2001-06-13. Statistics of quantum transport in metal nanowires with surface disorder. https://arxiv.org/abs/cond-mat/0106244

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