Momentum Microscopy Investigation of the Local Band Structure of Monolayer WSe₂ Flakes: Toward Optoelectronic Device in Quantum Size.

ABSTRACT: Single-flake monolayer WSe₂ holds significant promise for advanced optoelectronic applications at the quantum scale, leveraging its direct band gap electronic properties that are distinct from those of the bulk material. Probing momentum-resolved electronic structure at the single-flake level remains a key challenge in two-dimensional (2D) materials research due to the spatial mismatch between micron-scale flakes and conventional photoemission techniques. Here, we use momentum microscopy (MM) to investigate the local band structure of monolayer WSe₂ flakes grown by metal-organic chemical vapor deposition (MOCVD) on bilayer graphene (BLG) using Helium-I radiation. Despite differing crystallographic orientations, all flakes exhibit identical energy-momentum (E-k) disper

SUBMITTER: Chuang TH 

PROVIDER: S-EPMC12687315 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature