SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 14: Surface Magnetism
MA 14.1: Hauptvortrag
Dienstag, 28. März 2023, 09:30–10:00, HSZ 04
Antiferromagnetism-driven two-dimensional topological nodal-point superconductivity — •Roberto Lo Conte1, Maciej Bazarnik1,2, Eric Mascot1, Krisztián Palotás3, Levente Rózsa4, László Szunyogh3, André Kubetzka1, Dirk K. Morr5, Kirsten von Bergmann1, and Roland Wiesendanger1 — 1Department of Physics, University of Hamburg, Germany — 2Institute of Physics, Poznan University of Technology, Poland — 3Department of Theoretical Physics, Budapest University of Technology and Economics, Hungary — 4Department of Physics, University of Konstanz, Germany — 5Department of Physics, University of Illinois at Chicago, USA
In the recent years, pioneering studies have been carried out on magnet/superconductor hybrid systems[1-4], motivated by their potential to host emergent quantum phases such as topological superconductivity. Here, we present the discovery of a topological nodal-point superconducting phase in antiferromagnetic manganese (Mn) monolayer islands on superconducting niobium (Nb) via low temperature spin-polarized STM[5]. Low-energy edge modes are found to separate the topological phase from the trivial one. The relative spectral weight of the edge modes depends on the edge's atomic configuration, which is a fingerprint of the discovered topological state. [1]S. Nadj Perge et al., Science 346, 602(2014). [2]A. Palacio-Morales et al., Sci. Adv. 5, eaav6600(2019). [3]L. Schneider et al., Nat. Phys. 17, 943(2021). [4]S. Kezilebieke et al., Nature 588, 424(2020). [5]R. Lo Conte et al., PRB 105, L100406(2022). M. Bazarnik et al., arXiv:2208.12018(2022).