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O: Fachverband Oberflächenphysik
O 68: Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation IV
O 68.6: Vortrag
Mittwoch, 19. März 2025, 16:15–16:30, H24
Atomically Precise Control of Topological State Hybridization in Conjugated Polymers — Alejandro Jiménez-Martín1,2, Zdenka Sosnová2, Diego Soler2, Benjamin Mallada1, Héctor González-Herrero1, Shayan Edalatmanesh1,2, Pavel Jelínek1,2, and •Bruno de la Torre1,3 — 1Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, 78371 Olomouc, Czech Republic — 2Institute of Physics of the Czech Academy of Sciences, 16200 Prague, Czech Republic — 3Nanomaterials and Nanotechnology Research Center (CINN), CSIC-UNIOVI-PA, 33940 El Entrego, Spain
Realization of topological quantum states in carbon nanostructures has recently emerged as a promising platform for hosting highly coherent and controllable quantum dot spin qubits. However, their adjustable manipulation remains elusive. Here, we report the atomically accurate control of the hybridization level of topologically protected quantum edge states emerging from topological interfaces in bottom-up-fabricated π-conjugated polymers. Our investigation employed a combination of low-temperature scanning tunneling microscopy and spectroscopy, along with high-resolution atomic force microscopy, to effectively modify the hybridization level of neighboring edge states by the selective dehydrogenation reaction of molecular units in a pentacene-based polymer and demonstrate their reversible character.
Keywords: Topological Quantum Phase Transition; Conjugated Polymers; Atomic Manipulation; STM/AFM; on-surface synthesis