Long range statistical fluctuations of the crossed Josephson current
arXiv:cond-mat/0505211 · doi:10.1103/PhysRevB.72.134508
Abstract
We investigate the crossed Josephson effect in a geometry consisting of a double ferromagnetic bridge between two superconductors, with tunnel interfaces. The crossed Josephson current vanishes on average because the Andreev reflected hole does not follow the same sequence of impurities as the incoming electron. We show that i) the root mean square of the crossed Josephson current distribution is proportional to the square root of the junction area; and ii) the coherent coupling mediated by fluctuations is ``long range'' since it decays over the ferromagnet phase coherence length , larger than the exchange length. We predict a crossed Josephson current due to fluctuations if the length of the ferromagnets is smaller than and larger than the exchange length .
8 pages, 3 figures, modifications in the presentation
References in corpus (24)
- Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
- Long-range effects in superconductor-ferromagnet structures
- Hamiltonian approach to the transport properties of superconducting quantum point contacts
- Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
- Experimental observation of bias-dependent non-local Andreev reflection
- Quantum Spin Fluctuations as a Source of Long-Range Proximity Effects in Diffusive Ferromagnet-Superconductor Structures
- Correlated tunneling into a superconductor in a multiprobe hybrid structure
- Phase coherent transport in hybrid superconducting nanostructures
- Half-integer Shapiro steps at the 0-pi crossover of a ferromagnetic Josephson junction
- Current-current correlations in hybrid superconducting and normal metal multiterminal structures
- Sign of the crossed conductances at a FSF double interface
- Spin accumulation induced resistance in mesoscopic ferromagnet/ superconductor junctions
- Andreev scattering and cotunneling between two superconductor-normal metal interfaces : the dirty limit
- Crossed Andreev Reflection in Structures Consisting of a Superconductor with Ferromagnetic Leads
- Entangled electron current through finite size normal-superconductor tunneling structures
- Non-equilibrium supercurrent through mesoscopic ferromagnetic weak links
- Andreev drag effect in ferromagnetic-normal-superconducting systems
- Positive cross-correlations induced by ferromagnetic contacts
- Crossed Andreev reflection at ferromagnetic domain walls
- Nonsinusoidal current-phase relation in SFS Josephson junctions
- Superconducting crossed correlations in ferromagnets: implications for thermodynamics and quantum transport
- Andreev conductance of a domain wall
- sin(2 phi) current-phase relation in SFS junctions with decoherence in the ferromagnet
- Toy models of crossed Andreev reflection
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- Cooper pair splitting in diffusive magnetic SQUIDs
- Mesoscopic supercurrent fluctuations in diffusive magnetic Josephson junctions
- Cooper pair splitting in ballistic ferromagnetic SQUIDs