SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 8: Yu-Shiba-Rusinov Systems
TT 8.4: Vortrag
Montag, 27. März 2023, 16:00–16:15, HSZ 103
Building crystalline topological superconductors from Shiba lattices — •Martina Ondina Soldini1, Felix Küster2, Glenn Wagner1, Souvik Das2, Amal Aldarawsheh3,5, Ronny Thomale4,6, Samir Lounis3,5, Stuart S. P. Parkin2, Paolo Sessi2, and Titus Neupert1 — 1University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland — 2Max Planck Institute of Microstructure Physics, Halle, Germany — 3Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, Jülich, Germany — 4Institut fur Theoretische Physik und Astrophysik, Universitat Wurzburg, Wurzburg, Germany — 5Faculty of Physics, University of Duisburg-Essen and CENIDE, Duisburg, Germany — 6Department of Physics and Quantum Centers in Diamond and Emerging Materials (QuCenDiEM) Group, Indian Institute of Technology Madras, Chennai, India
Majorana boundary modes are the key feature of topological superconductors. Lattices of Shiba bound states, arising from magnetic adatoms placed on the surface of a conventional superconductor, may host these topological excitations. With scanning tunneling microscopy we create and probe adatom lattices to create topological crystalline superconductors. We combine theoretical modeling and experimental analysis to reveal signatures consistent with mirror-symmetry protected topological superconductors, hosting edge and higher-order corner states. Our results show the immense versatility of Shiba lattices to design the topology of 2D superconductors.