SKM 2021 – scientific programme

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MA: Fachverband Magnetismus

MA 1: Surface Magnetism (joint session MA/O)

MA 1.6: Talk

Monday, September 27, 2021, 11:30–11:45, H5

On-surface synthesis of magnetic organometallic chains on the superconducting Ag/Nb(110) substrate — •Jung-Ching Liu¹, Philipp D'Astolfo¹, Carl Drechsel¹, Xunshan Liu², Silvio Decurtins², Shi-Xia Liu², Rémy Pawlak¹, Wulf Wulfhekel³, and Ernst Meyer¹ — ¹Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH 4056 — ²Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern, CH 3012 — ³Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131 Karlsruhe, Germany

With proximity to s-wave superconductivity, spin texture arises on a magnetic chain and Majorana bound states (MBSs) can be found at two ends[1-3]. To study MBSs with diverse magnetic structures, we propose to conjugate magnetic atoms with organic molecules via on-surface reaction. Choosing Fe and PTO, we fabricate magnetic chains on the superconducting Ag/Nb substrate[4,5]. With the investigation with STM and AFM at 4.7K, we confirm the proximity-induced superconductivity on Ag from Nb, as well as the success in growing magnetic organometallic chains. We believe our work demonstrates the feasibility of growing tunable magnetic lattices by changing organic molecules. Above all, the direct synthesis on a superconductor offers a convenient way to study the interaction between magnetic lattices and superconductivity. [1]S. Nadj-Perge et al. Science 2014, 346, 602-607 [2]M. Ruby et al. Nano Lett. 2017, 17, 4473-4477 [3]R. Pawlak et al. Npj Quantum Inf. 2016, 2, 16035 [4]A. D. Pia et al. Chem. Eur. J. 2016, 22, 8105-8112 [5]T. Tomanic et al. Phys. Rev. B 2016, 94, 220503