Pressure tuning of minibands in MoS2/WSe2 heterostructures revealed by moiré phonons

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dc.creatorLuiz Gustavo Pimenta Martins
dc.creatorMatheus Josué de Souza Matos
dc.creatorJing Kong
dc.creatorRiccardo Comin
dc.creatorDavid Angel Ruiz Tijerina
dc.creatorConnor A. Occhialini
dc.creatorJi-Hoon Park
dc.creatorQian Song
dc.creatorAng-Yu Lu
dc.creatorPedro Paulo de Mello Venezuela
dc.creatorLuiz Gustavo de Oliveira Lopes Cançado
dc.creatorMario Sergio de Carvalho Mazzoni
dc.date.accessioned2025-07-24T17:18:21Z
dc.date.accessioned2025-09-09T00:26:42Z
dc.date.available2025-07-24T17:18:21Z
dc.date.issued2023
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.identifier.doihttps://doi.org/10.1038/s41565-023-01413-3
dc.identifier.issn1748-3395
dc.identifier.urihttps://hdl.handle.net/1843/83816
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofNature nanotechnology
dc.rightsAcesso Restrito
dc.subjectAnálise espectral
dc.subjectNanomateriais
dc.subjectPropriedades eletrônicas
dc.subject.otherElectronic properties and materials
dc.subject.otherTwo-dimensional materials
dc.titlePressure tuning of minibands in MoS2/WSe2 heterostructures revealed by moiré phonons
dc.typeArtigo de periódico
local.citation.epage1153
local.citation.spage1147
local.citation.volume18
local.description.resumoMoiré superlattices of two-dimensional heterostructures arose as a new platform to investigate emergent behaviour in quantum solids with unprecedented tunability. To glean insights into the physics of these systems, it is paramount to discover new probes of the moiré potential and moiré minibands, as well as their dependence on external tuning parameters. Hydrostatic pressure is a powerful control parameter, since it allows to continuously and reversibly enhance the moiré potential. Here we use high pressure to tune the minibands in a rotationally aligned MoS2/WSe2 moiré heterostructure, and show that their evolution can be probed via moiré phonons. The latter are Raman-inactive phonons from the individual layers that are activated by the moiré potential. Moiré phonons manifest themselves as satellite Raman peaks arising exclusively from the heterostructure region, increasing in intensity and frequency under applied pressure. Further theoretical analysis reveals that their scattering rate is directly connected to the moiré potential strength. By comparing the experimental and calculated pressure-induced enhancement, we obtain numerical estimates for the moiré potential amplitude and its pressure dependence. The present work establishes moiré phonons as a sensitive probe of the moiré potential as well as the electronic structures of moiré systems.
local.identifier.orcidhttps://orcid.org/0000-0001-9777-7999
local.identifier.orcidhttps://orcid.org/0000-0002-0398-3992
local.identifier.orcidhttps://orcid.org/0000-0003-0551-1208
local.identifier.orcidhttps://orcid.org/0000-0002-1069-9973
local.identifier.orcidhttps://orcid.org/0000-0001-7688-2511
local.identifier.orcidhttps://orcid.org/0000-0002-2133-5155
local.identifier.orcidhttps://orcid.org/0000-0003-4776-5206
local.identifier.orcidhttps://orcid.org/0000-0002-4166-2487
local.identifier.orcidhttps://orcid.org/0000-0003-0816-0888
local.identifier.orcidhttps://orcid.org/0000-0001-5897-6936
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.nature.com/articles/s41565-023-01413-3#citeas

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