Shot noise measurements in NS junctions and the semiclassical theory

Details Shot noise measurements in NS junctions and the semiclassical theory Shot noise measurements in NS junctions and the semiclassical theory

2000-09-21

arxiv.org/abs/cond-mat/0009340v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

2 pages, revtex, 2 eps figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.63.052511

We present a new analysis of shot noise measurements in normal metal-superconductor (NS) junctions [X. Jehl et al., Nature 405, 50 (2000)], based on a recent semiclassical theory. The first calculations at zero temperature assuming quantum coherence predicted shot noise in NS contacts to be doubled with respect to normal contacts. The semiclassical approach gives the first opportunity to compare data and theory quantitatively at finite voltage and temperature. The doubling of shot noise is predicted up to the superconducting gap, as already observed, confirming that phase coherence is not necessary. An excellent agreement is also found above the gap where the noise follows the normal case.

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