Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 70: Poster: Spins on Surfaces & Surface Magnetism

O 70.10: Poster

Wednesday, March 20, 2024, 18:00–20:00, Poster C

Exploring the magnetic field dependence of emulated molecular orbitals on Cs/InSb(110) — •Hermann Osterhage, Niels P. E. van Mullekom, Kira Junghans, Julian H. Strik, Emil Sierda, Anna M. H. Krieg, Danis Badrtdinov, Daniel Wegner, Mikhail I. Katsnelson, Malte Rösner, and Alexander A. Khajetoorians — Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands

Hermann Osterhage, Niels P. E. van Mullekom, Kira Junghans, Julian H. Strik, Emil Sierda, Anna M. H. Krieg, Danis Badrtdinov, Daniel Wegner, Mikhail I. Katsnelson, Malte Rösner, and Alexander A. Khajetoorians

Quantum simulators can be used to emulate custom-made Hamiltonians that are mathematically hard to solve in a physical system. In a recent realization of a quantum simulator, molecular orbitals were emulated by positioning individual Cs atoms on an InSb(110) surface [1]. It was previously shown that this material system also exhibits Landau quantization in the presence of an out-of-plane magnetic field [2]. On this platform, artificial atoms can be realized as localized electronic states created from ring structures of Cs atoms, assembled using scanning tunneling microscopy. Coupling these artificial atoms in different geometries results in artificial molecular structures that emulate planar organic molecules with different symmetries [1]. The resulting structures show electronic states of multi-orbital, as well as hybrid orbital character. Here, we explore the role of magnetic field on the emulated molecular states.

[1] E. Sierda et al., Science 380, 1048 (2023).

[2] K. Hashimoto et al., Phys. Rev. Lett. 101, 256802 (2008).

Keywords: 2D electron system; semiconductor; STM; artificial lattices; Landau quantization