Semiclassical theory of current correlations in chaotic dot-superconductor systems

Details Semiclassical theory of current correlations in chaotic dot-superconductor systems Semiclassical theory of current correlations in chaotic dot-superconductor systems

2002-07-24

arxiv.org/abs/cond-mat/0207585v1

Phys. Rev. B 66 201306(R) (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.66.201306

We present a semiclassical theory of current correlations in multiterminal chaotic dot-superconductor junctions, valid in the absence of the proximity effect in the dot. For a dominating coupling of the dot to the normal terminals and a nonperfect dot-superconductor interface, positive cross correlations are found between currents in the normal terminals. This demonstrates that positive cross correlations can be described within a semiclassical approach. We show that the semiclassical approach is equivalent to a quantum mechanical Green's function approach with suppressed proximity effect in the dot.

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