Full counting statistics of Andreev scattering in an asymmetric chaotic cavity

Details Full counting statistics of Andreev scattering in an asymmetric chaotic cavity Full counting statistics of Andreev scattering in an asymmetric chaotic cavity

2004-12-13

arxiv.org/abs/cond-mat/0412320v2

Phys. Rev. B 72, 134522 (2005)

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures

Scientific paper

10.1103/PhysRevB.72.134522

We study the charge transport statistics in coherent two-terminal double junctions within the framework of the circuit theory of mesoscopic transport. We obtain the general solution of the circuit-theory matrix equations for the Green's function of a chaotic cavity between arbitrary contacts. As an example we discuss the full counting statistics and the first three cumulants for an open asymmetric cavity between a superconductor and a normal-metal lead at temperatures and voltages below the superconducting gap. The third cumulant shows a characteristic sign change as a function of the asymmetry of the two quantum point contacts, which is related to the properties of the Andreev reflection eigenvalue distribution.

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