Realization of fractional-layer transition metal dichalcogenides.

ABSTRACT: Layered van der Waals transition metal dichalcogenides (TMDCs), generally composed of three atomic X-M-X planes in each layer (M = transition metal, X = chalcogen), provide versatile platforms for exploring diverse quantum phenomena. In each MX₂ layer, the M-X bonds are predominantly covalent in nature and, as a result, the cleavage of TMDC crystals normally occurs between the layers. Here we report the controllable realization of fractional-layer WTe₂ via an in-situ scanning tunneling microscopy (STM) tip manipulation technique. By applying STM tip pulses, hundreds of the topmost Te atoms are removed to form a nanoscale monolayer Te pit in the 1 T'-WTe₂, thus realizing a 2/3-layer WTe₂ film. Such a configuration undergoes a spontaneous atomic re

SUBMITTER: Zhao YX 

PROVIDER: S-EPMC12006514 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature