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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 79: Nanostructured Surfaces and Thin Films I: 1D and 2D Networks (joint session O/CPP)
CPP 79.6: Vortrag
Mittwoch, 18. März 2020, 16:15–16:30, WIL B321
Tuning electronic transport of 1D coordination polymers by the choice of the transition metal: Fe, Co and Ni — •Aleš Cahlík1, Christian Wäckerlin1, Santhini Vijai Meena1, Oleksander Stetsovych1, Jesus Mendieta1, Pingo Mutombo1, Simon Pascal2, Olivier Siri2, and Pavel Jelínek1 — 1Institute of Physics, Czech Academy of Sciences, v.v.i., Czech Republic, — 2Aix Marseille Université, CNRS, Marseille, France,
The choice of transition metal atom in organometallic complexes can significantly influence their electronic and spintronic properties. Here, we study the electronic transport through 1D coordination polymers contacted by the tip of a scanning probe microscope (SPM). The polymers are synthesized in-situ by co-deposition of Fe, Co or Ni atoms and the quinonediimine (2,5-diamino-1,4-benzoquinone-diimine) ligand onto Au(111). The combination of STM and nc-AFM allows for simultaneous measurement of the current, conductance and force gradient as a function of bias voltage and lifting height. We observe a distinct bandgap opening behavior depending on the incorporated metal element. In addition, we show the possibility to modulate the conductance of these wires between highly conductive and non-conductive by increased bias voltage or upon light illumination.