SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 38: Poster: Organic Molecules on Inorganic Substrates II

O 38.4: Poster

Dienstag, 28. März 2023, 18:00–20:00, P2/EG

Fabrication of Kondo Lattice via On-surface Reactions — •Jung-Ching Liu¹, Rémy Pawlak¹, Xing Wang², Chao Li¹, Outhmane Chahib¹, Ping Zhou², Robert Häner², Silvio Decurtins², Ulrich Aschauer², Shi-Xia Liu², and Ernst Meyer¹ — ¹Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel — ²Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern

Magnetic atoms assembled in different lattices can exhibit various characteristics, such as spin frustration, heavy fermion, or spin textures via RKKY interaction[1]. Different from scanning probe tip manipulation[2] or e-beam evaporation[3], we perform on-surface reaction to realize magnetic lattice using pyrene-4,5,9,10-tetraone (PTO) and Fe on Ag(111)[4]. The STM and AFM structural investigation at 4K shows 1:1 coordination of PTO and Fe, resulting in 1D chains which further self-assemble into the close-packed pattern. Tunneling spectra measured at 1K confirm Kondo resonance localized on Fe atoms, with moderate dispersion on PTO. The dip lineshape of the Kondo resonance could indicate the spin-1 state on Fe[5]. The successful synthesis of magnetic organometallic structures demonstrates the tunability of Kondo lattice structure by changing molecule species. We believe our work enables fundamental studies of spin-spin and spin-substrate interactions with different spin lattices.[1] Moro-Lagares et al. Nat. Comm. 10, 2211 (2019)[2]Nadj-Perge et al. Science 346[3]Palacio-Morales et al. Sci. Adv. 5, eaav6600 (2019)[4]Pia et al. Chem. Eur. J. 22, 8105-8112 (2016)[5]Li et al. Chem. Commun. 54, 9135-9138 (2018)