We fabricated nanoscale ferromagnetic Nickel/superconducting indium junctions which show that spin polarization effects on the contact conductance can be observed in a planar geometry. The data demonstrate that the Andreev–Saint-James [Sov. Phys. JETP 19, 1228 (1964) and J. Phys. (Paris) 25, 899 (1964)] electron-hole reflections at the interface, which are sensitive to the polarization of the side, dominate the conductance of the contact at low bias. The simplicity of fabrication makes these junctions appealing for use in multiterminal structures.
Observation of Andreev–Saint-James reflections in nano-scale planar superconductor to ferromagnet contacts
S. Hacohen-Gourgy, B. Almog, G. Deutscher; Observation of Andreev–Saint-James reflections in nano-scale planar superconductor to ferromagnet contacts. Appl. Phys. Lett. 14 April 2008; 92 (15): 152502. https://doi.org/10.1063/1.2909565
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