Correlations in van der Waals [Hetero]Structures by the Spectroscopic Fingerprints of Quasiparticles and Collective Excitations

Principal investigators

  1. Hua Lv, Paul-Drude-Institute for solid state electronics [webpage]
  2. Hans Tornatzky, Paul-Drude-Institute for solid state electronics [webpage]

teaser picture

Abstract

We are interested in exploring and understanding the optical and transport phenomena as well as the novel topological state of skyrmions in all-epitaxial and twisted 2D heterostructures by containing the room temperature ferromagnetic Fe5-xGeTe2 (FGT5) and semiconducting 2D materials such as transition-metal dichalcogenides (TMDCs), graphene and hBN (inter)layers. A fascinating aspect is the emergence of proximity effects when two dissimilar materials are brought close together. While studies on the proximity effect are well underway, the influence of heterostructure design remains largely unknown. Therefore, we will investigate the effect of twist angle and material stacking on proximity effect in this project.

Central to the project’s experiments will be an attoliquid-system in which we will perform (magneto-)optical and (magneto-)transport measurements with the possibility of in-situ interlayer twist manipulation via the built-in atomic force microscopy (AFM). Additionally, we have access to further structural characterizations, including Raman spectroscopy and high-resolution transmission electron microscopy (HRTEM).