Exploring the structural and optoelectronic properties of natural insulating phlogopite in van der Waals heterostructures

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dc.contributor.authorCadore A.R.
dc.contributor.authorDe Oliveira R.
dc.contributor.authorLonguinhos R.
dc.contributor.authorTeixeira V.D.C.
dc.contributor.authorNagaoka D.A.
dc.contributor.authorAlvarenga V.T.
dc.contributor.authorRibeiro-Soares J.
dc.contributor.authorWatanabe K.
dc.contributor.authorTaniguchi T.
dc.contributor.authorPaniago R.M.
dc.contributor.authorMalachias A.
dc.contributor.authorKrambrock K.
dc.contributor.authorBarcelos I.D.
dc.contributor.authorDe Matos C.J.S.
dc.date.accessioned2024-03-12T19:14:37Z
dc.date.available2024-03-12T19:14:37Z
dc.date.issued2022
dc.description.abstract© 2022 IOP Publishing LtdNaturally occurring van der Waals crystals have brought unprecedented interest to nanomaterial researchers in recent years. So far, more than 1800 layered materials (LMs) have been identified but only a few insulating and naturally occurring LMs were deeply investigated. Phyllosilicate minerals, which are a class of natural and abundant LMs, have been recently considered as a low-cost source of insulating nanomaterials. Within this family an almost barely explored material emerges: Phlogopite (KMg3(AlSi3)O10(OH)2). Here we carry out a high throughput characterization of this LM by employing several experimental techniques, corroborating the major findings with first-principles calculations. We show that monolayers (1L) and few-layers of this material are air and temperature stable, as well as easily obtained by the standard mechanical exfoliation technique, have an atomically flat surface, and lower bandgap than its bulk counterpart, an unusual trend in LMs. We also systematically study the basic properties of ultrathin phlogopite and demonstrate that natural phlogopite presents iron impurities in its crystal lattice, which decreases its bandgap from about 7 eV to 3.6 eV. Finally, we combine phlogopite crystals with 1L-WS2 in ultrathin van der Waals heterostructures and present a photoluminescence study, revealing a significant enhancement on the 1L-WS2 optical quality (i.e. higher recombination efficiency through neutral excitons) similarly to that obtained on 1L-WS2/hexagonal boron nitride heterostructures. Our proof-of-concept study shows that phlogopite should be regarded as a good and promising candidate for LM-based applications as a low-cost layered nanomaterial.
dc.description.issuenumber3
dc.description.volume9
dc.identifier.doi10.1088/2053-1583/ac6cf4
dc.identifier.issn2053-1583
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34344
dc.relation.ispartof2D Materials
dc.rightsAcesso Restrito
dc.subject.otherlanguage2D materials
dc.subject.otherlanguagenatural insulating
dc.subject.otherlanguageoptoelectronics
dc.subject.otherlanguagephlogopite
dc.titleExploring the structural and optoelectronic properties of natural insulating phlogopite in van der Waals heterostructures
dc.typeArtigo
local.scopus.citations17
local.scopus.eid2-s2.0-85130703080
local.scopus.subject2d material
local.scopus.subjectHigh through-put characterization
local.scopus.subjectLayered material
local.scopus.subjectLow-costs
local.scopus.subjectNatural insulating
local.scopus.subjectNaturally occurring
local.scopus.subjectOptoelectronics property
local.scopus.subjectPhyllosilicate
local.scopus.subjectUltra-thin
local.scopus.subjectVan der Waal
local.scopus.updated2024-12-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85130703080&origin=inward
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