SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 20: Poster: Spins and Magnetism at Surfaces

O 20.11: Poster

Montag, 27. März 2023, 18:00–20:00, P2/EG

Observation of in-gap states on 4f-shell magnet-superconductor hybrid system — •Yu Wang, Felix Friedrich, Artem Odobesko, and Matthias Bode — Physikalisches Institut, Experimentelle Physik II, Universitaet Wuerzburg, Am Hubland, D-97074 Würzburg, Germany

Magnetic impurities assembled on s-wave superconductor are the prototypical system for the realization of MZMs at the chain ends. Particularly the magnet-superconductor hybrid system of one-dimensional magnetic chains on superconductors has been well demonstrated theoretically and experimentally. Nowadays, various 3d-shell transition metals (Cr, Mn, Fe, Co, Ni) on clean Nb (110) have been studied [1-3]. Among them, only Mn and Fe chains exhibits benchmarks of topological superconductivity with MZMs at the chain ends. In addition to 3d-shell metals as magnetic impurities, 4f-shell magnetic metals could be another option. Among them, Gd shows the highest potential because it has the highest magnetic moment (s = 7/2) in 4f-shell. In this study, we will show that Gd dimers on Nb (110) behave similar as Fe/Mn with two pairs of in-gap states. It could be possible to realize MZMs on Gd chain ends in the future.
[1] D. Crawford and E. Mascot, arXiv: 2109.06894v1 [cond-mat.super-con], (2021)
[2] L. Schneider et al., Nature Physics 17, 943 (2021)
[3] A. Odobesko et al., Physical Review B 11, 99 (2019)