SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 57: Poster: Superconductivity I
TT 57.1: Poster
Donnerstag, 30. März 2023, 15:00–18:00, P2/OG2
Influence of reduced dimensionality on the superconducting properties of ultrathin aluminum films — Werner M.J. van Weerdenburg1, •Anand Kamlapure1, Eirik Holm Fyhn2, Xiaochun Huang1, Niels P.E. van Mullekom1, Manuel Steinbrecher1, Peter Krogstrup3, Jacob Linder2, and Alexander A. Khajetoorians1 — 1Institute for Molecules and Materials, Radboud University, 6525 AJ Nijmegen, the Netherlands — 2Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway — 3NNF Quantum Computing Programme, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
Study of superconductivity (SC) in lower dimensional systems is vital to devices involving multilayers and heterostructures for future quantum information applications. In this work, using scanning tunneling microscopy/spectroscopy, we study SC in ultrathin epitaxial Al films on Si(111) as we approach the 2D limit. With reducing thickness, we observe enhancement of SC where critical temperature and gap size shows threefold enhancement. In addition, we characterize the vortex structure in presence of strong Zeeman fields and find evidence for extended vortices showing paramagnetic Meissner effect originating from triplet pairing contributions. These results illustrate two striking influences of reduced dimensionality and present a new platform to study SC in presence of large magnetic fields. Reference: arXiv:2210.10645(2022).