Long-Range Spin-Polarized Quasiparticle Transport in Mesoscopic Al Superconductors with a Zeeman Splitting
F. Hübler, M. J. Wolf, D. Beckmann, H. v. Löhneysen
DOI 10.1103/PhysRevLett.109.207001 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report on nonlocal transport in multiterminal superconductor-ferromagnet structures, which were fabricated by means of e-beam lithography and shadow evaporation techniques. In the presence of a significant Zeeman splitting of the quasiparticle states, we find signatures of spin transport over distances of several μm, exceeding other length scales such as the coherence length, the normal-state spin-diffusion length, and the charge-imbalance length. The relaxation length of the spin signal shows a nearly linear increase with magnetic field, hinting at a freeze-out of relaxation by the Zeeman splitting. We propose that the relaxation length is given by the recombination length of the quasiparticles rather than a renormalized spin-diffusion length.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Coexistence of superconductivity and spin-splitting fields in superconductor/ferromagnetic insulator bilayers of arbitrary thickness
similarity 0.93Alberto Hijano et al.
Source status unknown — claims are unverified
Resistive quantum oscillations in superconducting aluminum microstructures
similarity 0.93I. N. Zhilyaev et al.
Source status unknown — claims are unverified
Quasiparticle Dynamics in a Superconducting Qubit Irradiated by a Localized Infrared Source
similarity 0.93R. Benevides et al.
Source status unknown — claims are unverified
Nonequilibrium superconductivity in spin-polarized superconducting tunneling junctions
similarity 0.93Claudio Grimaldi & Peter Fulde
Source status unknown — claims are unverified
Localization, superconducting fluctuations, and superconductivity in thin films and narrow wires of aluminum
similarity 0.93P. Santhanam et al.
Source status unknown — claims are unverified
Direct transport between superconducting subgap states in a double quantum dot
similarity 0.93G. O. Steffensen et al.
Source status unknown — claims are unverified