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O: Fachverband Oberflächenphysik
O 102: Poster Session VIII: Organic molecules on inorganic substrates: electronic, optical and other properties IV
O 102.8: Poster
Donnerstag, 4. März 2021, 13:30–15:30, P
SF-IETS studies on CuCu4(shi)4 metallacrown complex — •Robert Ranecki1, Stefan Lach1, Angeliki Athanasopoulou2, Eva Rentschler2, and Christiane Ziegler1 — 1Dept. of Physics and Research Center OPTIMAS, TU Kaiserslautern, Germany — 2Inst. of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Germany
Exchange coupled magnetic centers on surfaces are expected to provide an excellent platform for the development of spintronic technologies. For such structures, the detection of spin excitations by Low-Temperature Scanning Tunnelling Spectroscopy (LT-STS) has enabled investigations on coupling individual spins [1]. Up to now, however, only a few Spin-Flip Inelastic Tunneling Spectroscopy (SF-IETS) measurements have been performed on single molecules encapsulating several spin centers [2]. Here, we present LT-STS studies on an electrospray deposited 12-MC-4 pentacopper(II) metallacrown system. We observe symmetric around zero-bias features on differential conductance spectra, an evident hallmark of inelastic tunneling. We use third-order electron transport model [1], assuming exchange coupling constants determined by the broken symmetry approach [3], to analyze our experimental data. The obtained results provide access to intramolecular coupling of spins in a single molecular system with competing superexchange interactions.
[1] M.Ternes, et al. J. Phys. Condens. Matter 21 053001 (2009).
[2] S.Kahle, et al. Nano letters 12, 518-521 (2012).
[3] Y.Pavlyukh et al. Phys. Rev. B 99 144418 (2019).