SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Poster: Scanning Probe Microscopy with Quartz Sensors
O 66.11: Poster
Mittwoch, 29. März 2023, 18:00–20:00, P2/EG
Building up atomically-precise topological heterostructures in one-dimensional conjugated polymers — •Alejandro Jiménez-Martín1,2,3, Shayan Edalatmanesh1,2, Benjamin Mallada1,2, Héctor González-Herrero4, David Ecija5, Pavel Jelínek1,2, and Bruno de la Torre1,2 — 1Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Olomouc, Czech Republic — 2Czech Academy of Sciences, Prague, Czech Republic — 3Czech Technical University, Prague, Czech Republic — 4Universidad Autónoma, Madrid, Spain — 5IMDEA Nanoscience, Madrid, Spain
The discovery of topological phases in acene-based π-conjugated polymers has been one of the most exciting developments in the field of on-surface synthesis [1]. We recently demonstrated that the topological phase transition can be precisely controlled by the length of the polymer [2], where topologically protected zero-mode states forms at the boundary between two interfaces.
In this contribution, we use such new design criteria for engineering the quantum phase to place edge-gap states at specific sites within a single polymer. We investigate the electronic properties and level of hybridization in close enough topological states depending on their separation by Scanning Tunneling Microscopy and non-contact Atomic Force Microscopy. The results presented here could serve as a blueprint for creating topologically protected quantum spin chains.
[1] B. Cirera, et al., Nano letters 14, (2014).
[2] H. González-Herrero, et al., Advanced Materials 33, (2021)