SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 8: Focus Session: Emerging Phenomena in Superconducting Low Dimensional Hybrid Systems II
TT 8.8: Vortrag
Dienstag, 28. September 2021, 15:30–15:45, H7
Unconventional Meissner screening induced by chiral molecules in a conventional superconductor — Hen Alpern1, Morten Amundsen2, •Roman Hartmann3, Nir Sukenik1, Alfredo Spuri3, Shira Yochelis1, Thomas Prokscha4, Vitaly Gutkin1, Yonathan Anahory1, Elke Scheer3, Jacob Linder2, Zaher Salman4, Oded Milo1, Yossi Paltiel1, and Angelo Di Bernardo3 — 1The Hebrew University of Jerusalem — 2Norwegian University of Science and Technology — 3Universität Konstanz — 4Paul Scherrer Institut
Superconducting spintronics is emerging as an alternative technology that can overcome the main limitation of conventional spintronic devices, their high current dissipation. It has developed after the discovery that Cooper pairs with parallel-aligned spins (spin-triplets) can be generated at the interface between a conventional superconductor (S) and a magnetically inhomogeneous ferromagnet (F). More recently, by performing low-temperature scanning tunneling spectroscopy measurements of chiral molecules (ChMs) adsorbed on the surface of a Nb (S) thin film, we have observed subgap features due to spin-triplet states. Motivated by these results, we have performed low-energy muon spectroscopy on ChMs/Nb which shows evidence for an unconventional Meissner screening effect. Our experimental data and theoretical analysis show that the unconventional Meissner screening is due to the generation of spin-triplet pairs, as a result of the ChMs acting as a spin active interface. These results pave the way for the realisation of novel devices based on ChMs/S hybrids for superconducting spintronics.