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O: Fachverband Oberflächenphysik

O 70: Poster: Spins on Surfaces & Surface Magnetism

O 70.3: Poster

Mittwoch, 20. März 2024, 18:00–20:00, Poster C

Quantum simulator to emulate lower dimensional physics and chemistry — Emil Sierda, Xiaochun Huang, Danis Badrtdinov, Brian Kiraly, Elze Knol, •Anna M. H. Krieg, Gerrit C. Groenenboom, Mikhail I. Katsnelson, Malte Rösner, Daniel Wegner, and Alexander A. Khajetoorians — Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands

Designing materials with tailored physical and chemical properties requires a quantitative understanding of interacting quantum systems. In order to provide predictability, a promising route is to create bottom-up platforms, where the electronic properties of individual and interacting atoms can be emulated in a tunable manner. Here, we present a quantum simulator based on patterned Cs ions embedded in a 2DEG on the surface of semiconducting InSb(110). We use this platform to emulate the structure and orbital landscape of planar organic molecules. Using STM/STS and ab initio calculations, we show that an artificial atom can be derived from localized states of patterned Cs ions. The resultant potential can be used to couple artificial atoms, leading to bonding and anti-bonding states as well as to different orbital symmetries. Based on these artificial orbitals, we emulate molecular orbitals of known organic molecules based on various atomic structures. In a different limit where Cs atoms are much closer, this quantum simulator can also be used to probe the effect of e-e interactions. Our experimental data suggest that dense structures exhibit many-body effects which can be extended to complex quantum states based on arbitrary lattices.

Keywords: quantum simulator; artificial atoms; STM; atom manipulation