Direct imaging and electronic structure modulation of moire superlattices at the 2D/3D interface.

ABSTRACT: The atomic structure at the interface between two-dimensional (2D) and three-dimensional (3D) materials influences properties such as contact resistance, photo-response, and high-frequency electrical performance. Moiré engineering is yet to be utilized for tailoring this 2D/3D interface, despite its success in enabling correlated physics at 2D/2D interfaces. Using epitaxially aligned MoS₂/Au{111} as a model system, we demonstrate the use of advanced scanning transmission electron microscopy (STEM) combined with a geometric convolution technique in imaging the crystallographic 32 Å moiré pattern at the 2D/3D interface. This moiré period is often hidden in conventional electron microscopy, where the Au structure is seen in projection. We show, via ab initio electronic structure ca

SUBMITTER: Reidy K 

PROVIDER: S-EPMC7910301 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature