Nonlocal conductance via overlapping Andreev bound states in ferromagnet-superconductor heterostructures
arXiv:1006.3422 · doi:10.1103/PhysRevB.82.180503
Abstract
In a setup where two ferromagnetic electrodes are attached to a superconductor, Andreev bound states are induced at both ferromagnet/superconductor (FM/SC) interfaces. We study how these states propagate through the SC and interact with each other. As a result of this interaction, the energetic positions of the Andreev states are not anymore determined solely by the magnetic properties of a single interface, but also depend on the interface distance and the relative magnetization orientation of the FM contacts. We discuss how these bound states show up as distinct peaks in the nonlocal conductance signal, and lead to marked asymmetries with respect to the applied voltage. We relate our results to nonlocal crossed Andreev and elastic co-tunneling processes.
arXiv comment4 pages, 5 figures
References in corpus (25)
- The quantum spin Hall effect and topological insulators
- Triplet supercurrents in clean and disordered half-metallic ferromagnets
- Andreev - Saint James reflections: a probe of cuprate superconductors
- Theory of Half Metal-Superconductor Heterostructures
- Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
- Experimental observation of bias-dependent non-local Andreev reflection
- Correlated tunneling into a superconductor in a multiprobe hybrid structure
- Distribution functions in non-equilibrium theory of superconductivity and Andreev spectroscopy in unconventional superconductors
- Non-Local Correlations in Normal Metal-Superconducting Systems
- Josephson currents through spin-active interfaces
- Spin-dependent Cooper Pair Phase and Pure Spin Supercurrents in Strongly Polarized Ferromagnets
- Reversing non-local transport through a superconductor by electromagnetic excitations
- The scattering problem in non-equilibrium quasiclassical theory of metals and superconductors: general boundary conditions and applications
- Sign of the crossed conductances at a FSF double interface
- Circuit theory of crossed Andreev reflection
- 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
- Crossed Andreev reflection in diffusive contacts
- Crossed Andreev reflection at spin-active interfaces
- Non-local Andreev reflection in superconducting quantum dots
- Theory of superconductor-ferromagnet point contact spectra: the case of strong spin polarization
- Crossed Andreev reflection and charge imbalance in diffusive NSN structures
- Contribution of weak localization to non local transport at normal metal / superconductor double interfaces
- Conductance and current noise of a superconductor/ferromagnet quantum point contact
- Non-local Andreev reflection under ac bias
Cited by in corpus (13)
- Spin-polarized supercurrents for spintronics: a review of current progress
- Nonlocal Thermoelectric Effects and Nonlocal Onsager Relations in a Three-Terminal Proximity-Coupled Superconductor-Ferromagnet Device
- Long-range spin-polarized quasiparticle transport in mesoscopic Al superconductors with a Zeeman splitting
- Fine energy splitting of overlapping Andreev bound states in multi-terminal superconducting nanostructures
- Observation of Andreev bound states at spin-active interfaces
- Adiabatic pumping in a double-dot Cooper-pair beam splitter
- Overlapping Andreev states in semiconducting nanowires: competition of 1D and 3D propagation
- Theory of Andreev Bound States in S-F-S Junctions and S-F Proximity Devices
- Anomalous polarization-dependent transport in nanoscale double-barrier superconductor/ferromagnet/superconductor junctions
- Transport in multi-terminal superconductor/ferromagnet junctions having spin-dependent interfaces
- Superconductivity-enhanced spin pumping: Role of Andreev resonances
- Anomalous inverse proximity effect in unconventional-superconductor junctions
- Spin imbalance in hybrid superconducting structures with spin-active interfaces