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1. Identificação
Tipo de ReferênciaArtigo em Revista Científica (Journal Article)
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/427E63L
Repositóriosid.inpe.br/mtc-m21c/2020/03.23.14.09   (acesso restrito)
Última Atualização2020:12.17.13.35.21 (UTC) administrator
Repositório de Metadadossid.inpe.br/mtc-m21c/2020/03.23.14.09.20
Última Atualização dos Metadados2022:01.04.01.35.02 (UTC) administrator
DOI10.1103/PhysRevMaterials.4.023602
ISSN2475-9953
Chave de CitaçãoRodriguesJúniorMRRASGPM:2020:PsReRo
TítuloDirect observation of large strain through van der Waals gaps on epitaxial Bi2Te3/graphite: Pseudomorphic relaxation and the role of Bi-2 layers on the BixTey topological insulator series
Ano2020
MêsFeb.
Data de Acesso14 maio 2024
Tipo de Trabalhojournal article
Tipo SecundárioPRE PI
Número de Arquivos1
Tamanho4315 KiB
2. Contextualização
Autor1 Rodrigues Júnior, Gilberto
2 Marcal, Lucas Atila Bernardes
3 Ribeiro, Guliherme A. s.
4 Rappl, Paulo Henrique de Oliveira
5 Abramof, Eduardo
6 Sciammarella, Paulo Vitor
7 Guimarães, Luciano de Moura
8 Perez, Carlos Alberto
9 Malachias, Angelo
Identificador de Curriculo1
2
3
4 8JMKD3MGP5W/3C9JJ37
5 8JMKD3MGP5W/3C9JGUH
Grupo1
2
3
4 LABAS-COCTE-INPE-MCTIC-GOV-BR
5 LABAS-COCTE-INPE-MCTIC-GOV-BR
Afiliação1 Universidade Federal de Minas Gerais (UFMG)
2 Universidade Federal de Minas Gerais (UFMG)
3 Universidade Federal de Minas Gerais (UFMG)
4 Instituto Nacional de Pesquisas Espaciais (INPE)
5 Instituto Nacional de Pesquisas Espaciais (INPE)
6 Universidade Federal de Viçosa (UFV)
7 Universidade Federal de Viçosa (UFV)
8 Laboratório Nacional de Luz Síncrotron (LNLS)
9 Universidade Federal de Minas Gerais (UFMG)
Endereço de e-Mail do Autor1
2
3
4 paulo.rappl@inpe.br
5 eduardo.abramof@inpe.br
RevistaPhysical Review Materials
Volume4
Número2
Páginase023602
Histórico (UTC)2020-03-23 14:11:06 :: simone -> administrator :: 2020
2022-01-04 01:35:02 :: administrator -> simone :: 2020
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
Tipo de Versãopublisher
ResumoLayered materials can usually grow without strain on top of distinct substrates if the only interaction between them is due to van der Waals forces. In such a scenario it would be expected that the heterointerface made up of weak bounds would not affect the overlayed material significantly for several large lattice-mismatched systems. Here we have studied the first stages of the heteroepitaxial growth of layered bismuth telluride topological insulator on top of highly oriented pyrolitic graphite (HOPG) by molecular beam epitaxy. Samples were investigated by atomic force microscopy (AFM), synchrotron x-ray diffraction (XRD), and micro-Raman spectroscopy. AFM images show hexagonal/triangular flat islands with exposed HOPG areas for the low coverage regime, and the lattice parameter of these Bi2Te3 structures were measured by XRD. The existence of pseudomorphic strain at the initial Bi2Te3 layers was retrieved by both XRD and Raman spectroscopy. We have found evidence that Bi2Te3 layers near the interface are subject to an in-plane compressive strain, leading to a pseudomorphic out-of-plane lattice expansion. Furthermore, the presence of Bi2Te3 islands locally distorts the topmost layer of HOPG, resulting in tensile strain which was measured by Raman spectroscopy. The observed relaxation of 0.1-0.2% for each van der Waals gap is used to calculate elastic constants of Bi-2 bilayers, which are crucial building blocks for the formation of other BixTey topological insulator compounds. Finally, the impact of such a strain in Bi2Te3 electronic structure was investigated by density functional theory calculations. The results show that the band structure of this strained material remains unchanged at the center of the Brillouin zone, confirming the robustness of surface states, but it is consistently affected at the M and K zone edges.
ÁreaFISMAT
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4. Condições de acesso e uso
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Arquivo AlvoPhysRevMaterials_v4_p023602_2020_Bi2Te3-HPOG.pdf
Grupo de Usuáriosself-uploading-INPE-MCTI-GOV-BR
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Visibilidadeshown
Permissão de Leituradeny from all and allow from 150.163
Permissão de Atualizaçãonão transferida
5. Fontes relacionadas
VinculaçãoTrabalho não Vinculado à Tese/Dissertação
Unidades Imediatamente Superiores8JMKD3MGPCW/3ESR3H2
DivulgaçãoSCOPUS
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
6. Notas
Campos Vaziosalternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn keywords label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarytype url
7. Controle da descrição
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