Unveiling the complex phonon nature and phonon cascades in 1L to 5L WSe<sub>2</sub> using multiwavelength excitation Raman scattering
Claire Blaga, Ángel Labordet Álvarez, Akshay Balgarkashi, Mitali Banerjee, Anna Fontcuberta i Morral, Mirjana Dimitrievska
Abstract
We unveil the complex phonon dynamics of WSe 2 by using multiwavelength excitation Raman spectroscopy and report phonon-cascades for all WSe 2 flake thicknesses, indicating strong phonon–electron interactions during early carrier relaxation processes.
Topics & Concepts
PhononExcitationRaman scatteringRaman spectroscopyScatteringCondensed matter physicsPhysicsMaterials scienceMolecular physicsOpticsQuantum mechanics2D Materials and ApplicationsChalcogenide Semiconductor Thin FilmsOrganic and Molecular Conductors Research