Regensburg 2019 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 35: Spintronics (joint session TT/DY/MA)
TT 35.2: Talk
Tuesday, April 2, 2019, 14:15–14:30, H23
Channel analysis of atomic Pd contacts by Andreev Reflections — •Martin Prestel1, Torsten Pietsch1,2, and Elke Scheer1 — 1Department 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.
Delin et al., Phys. Rev. Lett. 92, 057201 (2004)
Strigl et al., Phys. Rev. B 94, 144431 (2016)
Scheer et al., Nature 394, 154 (1998)
Andersson et al., Physica C 367, 117-122 (2002)
Martin-Rodero et al., Physica C 352, 67-72 (2001)