Plasmonic Effects in Correlated Layered Heterostructures: From Plasmon-Polarons to Plasmonic Superconductivity

Due to confinement and a lack of screening layered materials host enhanced local and non-local Coulomb and electron-phonon interactions. These strong interactions are responsible for a plethora of pronounced many-body effects, ranging from strongly-bound excitons or gap-less plasmons to superconductivity or magnetism. At the same time, these fundamental interactions interplay with each other and can be controlled by the material’s environment. This allows for 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 in normal and superconducting phases. Focusing on the latter I will discuss how electron-phonon, electron-plasmon, and phonon-plasmon coupling can be tailored to trigger a crossover from conventional phonon-mediated superconductivity to unconventional plasmon-mediated pairing in layered superconducting heterostructures. For normal state layered heterostructures I will discuss the formation of novel interlayer plasmon-polarons.

If you would like to meet with Malte during his visit, please contact Hope Bretscher.