Franckeite as a naturally occurring van der Waals heterostructure.

ABSTRACT: The fabrication of van der Waals heterostructures, artificial materials assembled by individual stacking of 2D layers, is among the most promising directions in 2D materials research. Until now, the most widespread approach to stack 2D layers relies on deterministic placement methods, which are cumbersome and tend to suffer from poor control over the lattice orientations and the presence of unwanted interlayer adsorbates. Here, we present a different approach to fabricate ultrathin heterostructures by exfoliation of bulk franckeite which is a naturally occurring and air stable van der Waals heterostructure (composed of alternating SnS₂-like and PbS-like layers stacked on top of each other). Presenting both an attractive narrow bandgap (<0.7 eV) and p-type doping, we find that th

SUBMITTER: Molina-Mendoza AJ 

PROVIDER: S-EPMC5316837 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature