Dresden 2020 – scientific programme

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O: Fachverband Oberflächenphysik

O 93: Surface Magnetism (joint session MA/O)

O 93.4: Talk

Thursday, March 19, 2020, 10:30–10:45, HSZ 101

Dynamical spin-excitations of transition metal atoms deposited on superconducting surfaces — •Ana Montero, Filipe Souza Mendes Guimarães, Juba Bouaziz, and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

Recently, the interest in superconductors has been renewed thanks to their application in topological quantum computing — for instance, in the context of qubits, such as Majorana zero modes, which are in-gap states that can arise in nanostructures deposited atop superconductors. Based on ab-initio simulations [1], we systematically scrutinize the electronic and magnetic properties of 3d adatoms deposited on various superconducting surfaces above their critical temperature, and investigate their dynamical spin-excitation as probed via inelastic tunneling spectroscopy (IETS). The excitation lifetime, damping and signature in the transport spectra will be presented with a focus on the potential generation of many-body states resulting from the interaction of electrons and spin-excitations.
This work was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (ERC-consolidator Grant No. 681405-DYNASORE).
[1] B. Schweflinghaus et al. Phys. Rev. B 89, 235439 (2014).