Article (Périodiques scientifiques)
Dielectric Screening inside Carbon Nanotubes.
GORDEEV, Georgy; Wasserroth, Sören; Li, Han et al.
2024In Nano Letters, 24 (26), p. 8030 - 8037
Peer reviewed vérifié par ORBi
 

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Mots-clés :
carbon nanotubes; dielectric screening; double-walled nanotubes; excitons; one-dimensional heterostructures; resonant Raman; Inner tubes; Many-body effect; Metallics; Nano scale; One-dimensional; One-dimensional heterostructure; Optical technique; Bioengineering; Chemistry (all); Materials Science (all); Condensed Matter Physics; Mechanical Engineering; one-dimensionalheterostructures; resonantRaman
Résumé :
[en] Dielectric screening plays a vital role in determining physical properties at the nanoscale and affects our ability to detect and characterize nanomaterials using optical techniques. We study how dielectric screening changes electromagnetic fields and many-body effects in nanostructures encapsulated inside carbon nanotubes. First, we show that metallic outer walls reduce the scattering intensity of the inner tube by 2 orders of magnitude compared to that of air-suspended inner tubes, in line with our local field calculations. Second, we find that the dielectric shift of the optical transition energies in the inner walls is greater when the outer tube is metallic than when it is semiconducting. The magnitude of the shift suggests that the excitons in small-diameter inner metallic tubes are thermally dissociated at room temperature if the outer tube is also metallic, and in essence, we observe band-to-band transitions in thin metallic double-walled nanotubes.
Disciplines :
Physique
Auteur, co-auteur :
GORDEEV, Georgy  ;  University of Luxembourg ; Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
Wasserroth, Sören;  Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
Li, Han ;  Department of Mechanical and Materials Engineering, University of Turku, Vesilinnantie 5, 20500 Turku, Finland ; Turku Collegium for Science, Medicine and Technology, University of Turku, FI-20520 Turku, Finland
Jorio, Ado ;  Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 30123-970, Brazil
Flavel, Benjamin S ;  Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Reich, Stephanie ;  Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Dielectric Screening inside Carbon Nanotubes.
Date de publication/diffusion :
03 juillet 2024
Titre du périodique :
Nano Letters
ISSN :
1530-6984
eISSN :
1530-6992
Maison d'édition :
American Chemical Society, Etats-Unis
Volume/Tome :
24
Fascicule/Saison :
26
Pagination :
8030 - 8037
Peer reviewed :
Peer reviewed vérifié par ORBi
Organisme subsidiant :
Dahlem Research School, Freie Universität Berlin
Deutsche Forschungsgemeinschaft
H2020 European Research Council
Subventionnement (détails) :
G.G. and S.R. acknowledge the Focus Area NanoScale of Freie Universitaet Berlin and the supraFAB Research Center. S.R. acknowledges support by the Deutsche Forschungsgemeinschaft under Grant SPP 2244 (443275027) and the European Research Council ERC under Grant DarkSERS (772108). B.S.F. acknowledges support from the DFG under Grants FL 834/5-1, FL 834/7-1, FL 834/12-1, FL834/13-1, and FL 834/9-1. G.G. acknowledges funding from the Luxembourg National Research Fund (FNR) under Project [AWORD].
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depuis le 14 janvier 2025

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