Energy dependent counting statistics in diffusive superconducting tunnel junctions
arXiv:cond-mat/0210409 · doi:10.1103/PhysRevB.67.054508
Abstract
We present an investigation of the energy dependence of the full charge counting statistics in diffusive normal-insulating-normal-insulating-superconducting junctions. It is found that the current in general is transported via a correlated transfer of pairs of electrons. Only in the case of strongly asymmetric tunnel barriers or energies much larger than the Thouless energy is the pair transfer uncorrelated. The second cumulant, the noise, is found to depend strongly on the applied voltage and temperature. For a junction resistance dominated by the tunnel barrier to the normal reservoir, the differential shot noise shows a double peak feature at voltages of the order of the Thouless energy, a signature of an ensemble averaged electron-hole resonance.
8 pages, 5 figures
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- Energy dependence of current noise in superconducting/normal metal junctions
- Andreev reflection eigenvalue density in mesoscopic conductors
- Divergent beams of nonlocally entangled electrons emitted from hybrid normal-superconducting structures
- Full Counting Statistics in Quantum Contacts
- Phase dependent current statistics in short-arm Andreev interferometer
- Energy dependence of current noise in double-barrier normal-superconducting structures
- Current-voltage characteristics of asymmetric double-barrier Josephson junctions