Abstract
Spin polarized transport as measured by superconducting Andreev spectroscopy
Highlights
IntroductionSpin polarized current injected to a nonmagnetic conductor keeps the spin memory within a certain distance, typically in the submicron range [1,2]
The spin dependence of electronic transport is hidden in most metals
In the first part of this review we give a tutorial introduction to spin polarized transport based on the Landauer formalism [9], widely applied in the field of nanophysics
Summary
Spin polarized current injected to a nonmagnetic conductor keeps the spin memory within a certain distance, typically in the submicron range [1,2] Building on this principle, nanoscale devices have been prepared where the size of the components is well below this distance, the spin diffusion length, and both the control of the spin states and the utilization of the spin information have been demonstrated [1,2,3,4,5,6]. In the second part a special measurement technique is reviewed, which allows the direct determination of the current spin polarization, and with which even the decay of the spin polarization i.e. the spin diffusion length can be determined in a nonmagnetic layer
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