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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 Aldarawsheh^3,5, Ronny Thomale^4,6, Samir Lounis^3,5, 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.