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Momentum-resolved dielectric response of free-standing mono-, bi-and tri- layer black phosphorus

hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
hal.structure.identifierInstitut d'électronique fondamentale [IEF]
dc.contributor.authorGAUFRÈS, Étienne
hal.structure.identifierLEM, UMR 104 CNRS-ONERA, Université Paris Saclay (COmUE) [Châtillon]
dc.contributor.authorFOSSARD, Frédéric
hal.structure.identifierLaboratoire Cliniques Pathologique et Interculturelle [LCPI]
dc.contributor.authorGOSSELIN, Vincent
hal.structure.identifierLEM, UMR 104 CNRS-ONERA, Université Paris Saclay (COmUE) [Châtillon]
dc.contributor.authorSPONZA, Lorenzo
hal.structure.identifierLEM, UMR 104 CNRS-ONERA, Université Paris Saclay (COmUE) [Châtillon]
dc.contributor.authorDUCASTELLE, François
dc.contributor.authorLI, Zhenglu
hal.structure.identifierLawrence Berkeley National Laboratory [Berkeley] [LBNL]
dc.contributor.authorLOUIE, Steven
hal.structure.identifierDépartement de Chimie [Montréal]
dc.contributor.authorMARTEL, Richard
hal.structure.identifierDépartement de Physique [Montréal]
dc.contributor.authorCÔTÉ, Michel
hal.structure.identifierLEM, UMR 104 CNRS-ONERA, Université Paris Saclay (COmUE) [Châtillon]
dc.contributor.authorLOISEAU, Annick
dc.date.accessioned2023-05-12T10:45:16Z
dc.date.available2023-05-12T10:45:16Z
dc.date.issued2019-10-11
dc.identifier.issn1530-6984
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/181714
dc.description.abstractEnBlack phosphorus (BP), a 2D semiconducting material of interest in electronics and photonics, exhibits physical properties characterized by strong anisotropy and band gap energy that scales with reducing layer number. However, the investigation of its intrinsic properties is challenging because thin layer BP are photo oxidized in ambient conditions and the energy of their electronic states shift in different dielectric environment. We prepared free-standing samples of few layer BP in glovebox conditions and probed the dielectric response in vacuum using Scanning Transmission Electron Microscopy and Electron Energy Loss Spectroscopy (STEM-EELS). Thresholds of the excitation energy are measured at 1.9 eV, 1.4 eV and 1.1 eV for the mono-bi-and tri-layer BP, respectively and these values are used to estimate the corresponding optical band gaps. A comparison of our results with electronic structure calculations indicates that the variation of the quasi-particle gap is larger than that of the exciton binding energy. The dispersion of the plasmons versus momentum for 1-3 layer BP and bulk BP highlights a deviation from parabolic to linear dispersion and strong anisotropic fingerprints.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enMomentum-resolved dielectric response of free-standing mono-, bi-and tri- layer black phosphorus
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.nanolett.9b03928
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
bordeaux.journalNano Letters
bordeaux.hal.laboratoriesLaboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-02319648
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02319648v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Nano%20Letters&rft.date=2019-10-11&rft.eissn=1530-6984&rft.issn=1530-6984&rft.au=GAUFR%C3%88S,%20%C3%89tienne&FOSSARD,%20Fr%C3%A9d%C3%A9ric&GOSSELIN,%20Vincent&SPONZA,%20Lorenzo&DUCASTELLE,%20Fran%C3%A7ois&rft.genre=article


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