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O: Fachverband Oberflächenphysik
O 46: Poster Organic Molecules on Inorganic Substrates: Electronic, Optical and Other Properties
O 46.2: Poster
Dienstag, 18. März 2025, 18:00–20:00, P2
Self-assembly of magnetic complex on Cu (111) using scanning tunneling spectroscopy: probing Kondo resonance and decomposition effects — •Behzad Mortezapour1, Torben Adam2, Eike Kuhlemann2, Felix Tuczek2, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Germany — 2Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Germany
The spin-crossover complex bis-(hydro-tris-(3-methyl-pyrazolyl)-borat)-Iron(II) on Cu (111) at ambient temperature was investigated with a scanning tunneling microscope (STM) under ultrahigh-vacuum conditions at a temperature of 4.6 K. The three-dimensional molecules self-assemble into ordered two dimensional arrays while some decomposition also occurs. The STM images of the intact molecules exhibit a significant dependence on the bias voltage and spectra of the differential conductance (dI/dV) show a zero-bias resonance that we tentatively attribute to the Kondo effect. Time series of the current reveal abrupt transitions that possibly are linked to spin switching. In addition, negative differential resistance is observed from decomposed molecules.
Keywords: Magnetic molecules; Molecular self-assembly; Scanning tunneling microscopy; Kondo effect