Nonlocal transport mediated by nonlocal Hikami boxes: Condensation of evanescent quasiparticles injected into the superconducting gap

Abstract

Evanescent quasiparticles entering a superconductor and propagating over distances larger than the coherence length give rise to intermediate states induced by double Andreev scattering on disorder.The resulting effective attractive interaction between evanescent quasiparticles is retarded at the extremely slow frequency of the applied bias voltage. The non-BCS out-of-equilibrium mesoscopic condensate is compatible with a recent experiment [S. Russo et al., Phys. Rev. Lett. 95, 027002 (2005)]. Microscopic theory is discussed in the random phase approximation.

8 pages, 8 figures, long version

References in corpus (7)

• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Non-Local Correlations in Normal Metal-Superconducting Systems
• Sign of the crossed conductances at a FSF double interface
• Circuit theory of crossed Andreev reflection
• Crossed Andreev reflection in diffusive contacts
• Thouless energy of a superconductor from non local conductance fluctuations
• Andreev drag effect via magnetic quasiparticle focusing in normal-superconductor nanojunctions

Cited by in corpus (5)

• Non-local Andreev reflection in superconducting quantum dots
• Contact resistance dependence of crossed Andreev reflection
• Self-consistent microscopic calculations for non-local transport through nanoscale superconductors
• Weak localization corrections to the thermal conductivity in $s$-wave superconductors
• Subgap tunneling via quantum-interference effect: insulators and charge density waves