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Probing the Nature of Single-Photon Emitters in a WSe2 Monolayer by Magneto-Photoluminescence Spectroscopy.
Serati de Brito, Caique; Rosa, Bárbara L T; Chaves, Andrey; Cavalini, Camila; Rabahi, César R; Franco, Douglas F; Nalin, Marcelo; Barcelos, Ingrid D; Reitzenstein, Stephan; Gobato, Yara Galvão.
Afiliação
  • Serati de Brito C; Department of Physics, Federal University of São Carlos, São Carlos, SP 13565-905, Brazil.
  • Rosa BLT; Institute of Solid State Physics, Technische Universität Berlin, 10623 Berlin, Germany.
  • Chaves A; Departamento de Física, Universidade Federal do Ceará, 60455-760 Fortaleza, Ceará, Brazil.
  • Cavalini C; Department of Physics & NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium.
  • Rabahi CR; Department of Physics, Federal University of São Carlos, São Carlos, SP 13565-905, Brazil.
  • Franco DF; Department of Physics, Federal University of São Carlos, São Carlos, SP 13565-905, Brazil.
  • Nalin M; Institute of Chemistry, São Paulo State University─UNESP, CEP 14800-060 Araraquara, SP, Brazil.
  • Barcelos ID; Institute of Chemistry, São Paulo State University─UNESP, CEP 14800-060 Araraquara, SP, Brazil.
  • Reitzenstein S; Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials, Campinas (CNPEM), 13083-100 Campinas, SP, Brazil.
  • Gobato YG; Institute of Solid State Physics, Technische Universität Berlin, 10623 Berlin, Germany.
Nano Lett ; 24(42): 13300-13306, 2024 Oct 23.
Article em En | MEDLINE | ID: mdl-39388580
ABSTRACT
Monolayer transition metal dichalcogenides (TMDs) have emerged as promising materials to generate single-photon emitters (SPEs). While there are several previous reports in the literature about TMD-based SPEs, the precise nature of the excitonic states involved in them is still under debate. Here, we use magneto-optical techniques under in-plane and out-of-plane magnetic fields to investigate the nature of SPEs in WSe2 monolayers on glass substrates under different strain profiles. Our results reveal important changes on the exciton localization and, consequently, on the optical properties of SPEs. Remarkably, we observe an anomalous PL energy redshift with no significant changes of photoluminescence (PL) intensity under an in-plane magnetic field. We present a model to explain this redshift based on intervalley defect excitons under a parallel magnetic field. Overall, our results offer important insights into the nature of SPEs in TMDs, which are valuable for future applications in quantum technologies.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nano Lett Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nano Lett Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos