English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/219235
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Experimental demonstration of the suppression of optical phonon splitting in 2D materials by Raman spectroscopy

AuthorsDe Luca, Marta; Cartoixà, Xavier; Indolese, David I.; Martín-Sánchez, Javier; Watanabe, Kenji; Taniguchi, Takashi; Schönenberger, Christian; Trotta, Rinaldo; Rurali, Riccardo CSIC ORCID; Zardo, Ilaria
Issue Date2020
PublisherIOP Publishing
Citation2D Materials 7: 035017 (2020)
AbstractRaman spectroscopy is one of the most extended experimental techniques to investigate thin-layered 2D materials. For a complete understanding and modeling of the Raman spectrum of a novel 2D material, it is often necessary to combine the experimental investigation to density functional theory calculations. We provide the experimental proof of the fundamentally different behavior of polar 2D vs 3D systems regarding the effect of the dipole − dipole interactions, which in 2D systems ultimately lead to the absence of optical phonons splitting, otherwise present in 3D materials. We demonstrate that non-analytical corrections (NACs) should not be applied to properly model the Raman spectra of few-layered 2D materials, such as WSe2 and h-BN, corroborating recent theoretical predictions (Sohier et al 2017 Nano Lett. 17 3758–63). Our findings are supported by measurements performed on tilted samples that allow increasing the component of photon momenta in the plane of the flake, thus unambiguously setting the direction of an eventual NAC. We also investigate the influence of the parity of the number of layers and of the type of layer-by-layer stacking on the effect of NACs on the Raman spectra.
Publisher version (URL)https://doi.org/10.1088/2053-1583/ab81b1
Appears in Collections:(ICMAB) Artículos
(CINN) Artículos
Files in This Item:
File Description SizeFormat 
experespect.pdf2,29 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.