Single Sublayer Reconstruction in Substrate-Supported WS2 Twisted Bilayers
Journal
ACS Nano
Journal Volume
19
Journal Issue
28
Start Page
25662
End Page
25668
ISSN
1936-0851
1936-086X
Date Issued
2025-07-13
Author(s)
Hsu, Hung-Chang
Lee, Yi-Han
Chen, Hao-Yu
Schnedler, Michael
Li, Ming-Yang
Dunin-Borkowski, Rafal E.
Radu, Iuliana P.
Ebert, Philipp
Abstract
Marginally twisted WS2 bilayers undergo lattice reconstructions, but it is unclear if the distortion is equally distributed or confined to specific sublayers. Here, we use in situ combined noncontact atomic force microscopy with scanning tunneling spectroscopy to tune the probing depth to extract electronic and atomic lattice information for each sublayer separately. We find a lattice reconstruction unexpectedly confined to the WS2 layer in contact with graphite only, governed by transition metal dichalcogenide-substrate interactions, leading to a peculiar type of a ferroelectric domain wall.
Subjects
moiré superlattice
scanning tunneling microscopy
transition metal dichalcogenides
twisted bilayers
van der Waals heterostructures
Publisher
American Chemical Society (ACS)
Type
journal article