Quantum Many-Body Engineering: New Perspectives from Solid-State Theory and Reduced Dimensions

by Prof. Dr. Malte Rösner

Tuesday Oct 22, 2024, 4:15 PM → 5:45 PM Europe/Berlin

H 6 (UHG)

Due to confinement and a lack of screening, layered materials host enhanced many-body interactions between electrons and between electrons and atomic nuclei. These enhanced interactions are responsible for a variety of distinct quantum many-body effects, ranging from pronounced optical absorption features in the form of strongly bound electron-hole pairs (excitons) in semiconducting layered materials, to low-energy collective electron density excitations (plasmons) in metallic layered materials and all the way to various unconventional interacting ground states. At the same time, these fundamental interactions interplay with each other and can be precisely controlled, for example, by the environment of the material. This enables precise many-body engineering of correlated states of matter in layered heterostructures.  

In this talk, I will show examples of this many-body engineering concept applied to layered heterostructures that exhibit astonishing correlation phenomena. Using both experimental and theoretical data, I will illustrate the strengths of modern many-body ab initio methods and, based on this, outline most pressing challenges as well as most promising perspectives for the future of the field.

2024-10-24-ProfMalteRoesner.pdf