2022 CAP Congress / Congrès de l'ACP 2022

Scanning Tunneling Microscopy and Spectroscopy of a Graphene-rhenium Disulfide Heterostructure at Low Temperature

6 Jun 2022, 14:30

15m

MDCL 1010 (McMaster University)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) M2-7 Low Dimensional Materials and Heterostructures (DCMMP) | Matériaux à basse dimension et hétérostructures (DPMCM)

Speaker

Ryan Plumadore (University of Ottawa)

Description

Vertical stacking of atomically thin materials offers a large platform for realizing novel properties enabled by proximity effects and moiré patterns. Here, a van der Waals heterostructure consisting of monolayer graphene on in-plane anisotropic layered semiconductor ReS${}_2$ is prepared using dry-transfer technique. Locally resolved topographic images reveal a striped superpattern originating in the interlayer interactions between graphene's hexagonal structure and the triclinic, low in-plane symmetry of ReS${}_2$. Scanning tunneling spectroscopy at low temperature is used to characterize the modulation of the local density of states by this moiré pattern. These results shed light on the complex interface phenomena between van der Waals materials with different lattice symmetries.