Correlated Artificial Lattices Realized Through Patterned Adatoms, Impurities, and Vacancies in 2D Hosts

Speaker

Malte Rösner
Professor in the Theory of Condensed Matter Department (TCM), 
Institute for Molecules and Materials (IMM), Radboud University (RU), The Netherlands

Abstract

Artificial lattices hold high promises as model platforms to control and study correlation effects beyond the capabilities of highest-level theoretical descriptions. In this talk, Dr. Rösner will discuss various pathways to create such correlated artificial lattices via patterned “imperfections” in 2D host systems and show how state-of-the-art condensed matter theory can help to understand and guide the artificial lattice fabrication.

Dr. Rösner will specifically focus on a new platform based on patterned Cs adatoms on the InSb(110) surface, in which a 2D electron gas allows us to generate artificial atoms and molecules based on emulated 2D s- and p-orbitals. With the help of a combination of highest precision scanning probe experiments performed at the Scanning Probe Microscopy department and the ab initio theory developed at the Theory of Condensed Matter department at the Institute for Molecules and Materials at Radboud University (Nijmegen), Rösner and his team were able to microscopically understand the fundamental building blocks of this system, allowing them to emulate various Hamiltonians including correlated ones.

Biography

Malte Rösner received his PhD in physics from the Institute for Theoretical Physics at the University of Bremen, Germany.  received his PhD in Physics from the Institute for Theoretical Physics at the University of Bremen, Germany.  Dr. Rösner is currently a tenured faculty in the Theory of Condensed Matter Department (TCM), Institute for Molecules and Materials (IMM), at Radboud University (RU), in The Netherlands.  His most recent research is in material-realistic descriptions of correlation effects.