Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 35: Spintronics (joint session TT/DY/MA)

TT 35.2: Vortrag

Dienstag, 2. April 2019, 14:15–14:30, H23

Channel analysis of atomic Pd contacts by Andreev Reflections — •Martin Prestel1, Torsten Pietsch1,2, and Elke Scheer11Department of Physics, University of Konstanz, 78457 Konstanz, Germany — 2now at: Carl Zeiss AG, 73447 Oberkochen, Germany

For the strong paramagnetic material palladium (Pd) theoretical calculations predicted a local magnetic ordering [1]. In transport measurements a strong non-monotonic magneto-transport behaviour as well as indications for Kondo resonances have been reported for atomic contacts in Pd [2]. To get a more detailed view of the nature of this magnetic ordering we want to investigate the transport channel distribution and their spin polarisation in such contacts. Therefore we add superconducting leads to apply the method of multiple Andreev reflections [3, 4, 5]. In this talk I will present first experimental superconducting current-voltage characteristics revealing superconducting proximity effect into Pd depending on the exact atomic configuration.
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