Nano-optical Visualization of Interlayer Interactions in WSe₂/WS₂ Heterostructures.

ABSTRACT: The interplay between excitons and phonons governs the optical and electronic properties of transition metal dichalcogenides (TMDs). Even though a number of linear and nonlinear optical-, electron-, and photoelectron-based approaches have been developed and/or adopted to characterize excitons and phonons in single/few-layer TMDs and their heterostructures, no existing method is capable of directly probing ultralow-frequency and interlayer phonons on the nanoscale. To this end, we developed ultralow-frequency tip-enhanced Raman spectroscopy, which allows spectrally and spatially resolved chemical and structural nanoimaging of WSe₂/WS₂ heterostructures. In this work, we apply this method to analyze phonons in nanobubbles that are sustained in these heterobilayers. Our m

SUBMITTER: Rodriguez A 

PROVIDER: S-EPMC9335877 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature