Characterization of few-layer 1T' MoTe2 by polarization-resolved second harmonic generation and Raman scattering

Página do item simplificado
dc.creatorRyan Beams
dc.creatorFrancesca Tavazza
dc.creatorAlbert V. Davydov
dc.creatorStephan Jeffrey Stranick
dc.creatorLuiz Gustavo de Oliveira Lopes Cançado
dc.creatorSergiy Krylyuk
dc.creatorIrina Kalish
dc.creatorBerc Kalanyan
dc.creatorArunima K. Singh
dc.creatorKamal Choudhary
dc.creatorAlina Bruma
dc.creatorPatrick M. Vora
dc.date.accessioned2025-02-20T17:09:16Z
dc.date.accessioned2025-09-09T00:06:22Z
dc.date.available2025-02-20T17:09:16Z
dc.date.issued2016
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.identifier.doihttps://doi.org/10.1021/acsnano.6b05127
dc.identifier.issn19360851
dc.identifier.urihttps://hdl.handle.net/1843/80262
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofACS Nano
dc.rightsAcesso Restrito
dc.subjectEfeito de Raman
dc.subjectAnálise espectral
dc.subject.otherTwo-dimensional material
dc.subject.otherRaman scattering
dc.subject.otherSecond harmonic generation
dc.subject.otherCrystal symmetry
dc.subject.otherOptical spectroscopy
dc.titleCharacterization of few-layer 1T' MoTe2 by polarization-resolved second harmonic generation and Raman scattering
dc.typeArtigo de periódico
local.citation.epage9636
local.citation.issue10
local.citation.spage9626
local.citation.volume10
local.description.resumoWe study the crystal symmetry of few-layer 1T′ MoTe2 using the polarization dependence of the second harmonic generation (SHG) and Raman scattering. Bulk 1T′ MoTe2 is known to be inversion symmetric; however, we find that the inversion symmetry is broken for finite crystals with even numbers of layers, resulting in strong SHG comparable to other transition-metal dichalcogenides. Group theory analysis of the polarization dependence of the Raman signals allows for the definitive assignment of all the Raman modes in 1T′ MoTe2 and clears up a discrepancy in the literature. The Raman results were also compared with density functional theory simulations and are in excellent agreement with the layer-dependent variations of the Raman modes. The experimental measurements also determine the relationship between the crystal axes and the polarization dependence of the SHG and Raman scattering, which now allows the anisotropy of polarized SHG or Raman signal to independently determine the crystal orientation.
local.identifier.orcidhttps://orcid.org/0000-0003-2592-6064
local.identifier.orcidhttps://orcid.org/0000-0002-5602-180X
local.identifier.orcidhttps://orcid.org/0000-0003-4512-2311
local.identifier.orcidhttps://orcid.org/0000-0003-0816-0888
local.identifier.orcidhttps://orcid.org/0000-0003-4573-9151
local.identifier.orcidhttps://orcid.org/0000-0003-0285-9823
local.identifier.orcidhttps://orcid.org/0000-0003-3508-9693
local.identifier.orcidhttps://orcid.org/0000-0002-7212-6310
local.identifier.orcidhttps://orcid.org/0000-0001-9737-8074
local.identifier.orcidhttps://orcid.org/0000-0003-0493-7741
local.identifier.orcidhttps://orcid.org/0000-0003-3967-8137
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://pubs.acs.org/doi/10.1021/acsnano.6b05127

Arquivos

Licença do pacote

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
License.txt
Tamanho:
1.99 KB
Formato:
Plain Text
Descrição:
Baixar

Coleções

Artigo de Periódico

Logo UFMG