SFB 1238 | November 02, 13:30
Designer lattices on surfaces: from molecular orbitals toward correlated electronic structure and Quantum Hall states
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 botom-up platforms, where the electronic properties of individual and interacting atoms can be emulated in a tuneable manner. Here, I will present a solid state quantum simulator based solely on paterned Cs atoms on the surface of semiconducting InSb(110), a system characterized by dilute two-dimensional electron gas decoupled from the substrate’s bulk bands. This platform can be used to create electron traps which emulate artificial atoms by precisely positioning Cs atoms using STM-based atom manipulation. These artificial atoms served as building blocks to realize artificial molecular structures with different orbital symmetries which are subsequently probed. Moreover, I will illustrate newer examples of structures which are described by correlated electron models, as well as discuss new perspectives in magnetic fields and the role of the Quantum Hall Effect.
Prof. Alex Khajetoorians / University Nijmegen
Seminar Room of the Institute of Physics II
Contact: Prof. Thomas Michely