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O: Fachverband Oberflächenphysik

O 40: Organic Molecules on Inorganic Substrates III: Electronic, Optical and other Properties

O 40.6: Vortrag

Dienstag, 17. März 2020, 11:45–12:00, REC C 213

Supramolecular networks assembled on superconducting Pb surfaces — •Carl Drechsel¹, Philipp D'Astolfo¹, Xunshan Liu², Shi-Xia Liu², Silvio Decurtins², Rémy Pawlak¹, and Ernst Meyer¹ — ¹Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland — ²Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland

Due to their vast potential for functionalities, molecular assemblies at surfaces have attracted a certain interest in surface Physics. Recent experiments have shown the feasibility to create metal-organic nanochains with special catalytic properties [1], or to activate selected molecules for the use as molecular quantum cellular automata [2]. On superconductors, these molecules create ground states, formed by a balance between Kondo screening and superconducting pair-breaking interactions [3].

Here, we investigate the structural and electronic properties of self-assembled layers of 3-TBQP (3,6,14,17-tetrabromodibenzo[a,c]-dibenzo[5,6:7,8]-quinoxalino-[2,3-i]phenazine) on the superconducting Pb(111) surface. The layers are characterized at 4 K by scanning tunneling microscopy (STM) and atomic force microscopy (AFM) with CO-terminated tips. Our results show a fundamental step in developing functional supramolecular networks at supra-conductors [4].

[1] Krull, C. et al.; Nat Commun 9, 3211 (2018) - [2] Kocic, N. et al.; Nano Lett. 19, 5, 2750-2757 (2019) - [3] Franke, K.J. et al.; Science 332, 940 (2011) - [4] Drechsel, C. et al.; submitted