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Infrared Resonance Raman of Bilayer Graphene: Signatures of Massive Fermions and Band Structure on the 2D Peak.
Graziotto, Lorenzo; Macheda, Francesco; Venanzi, Tommaso; Marchese, Guglielmo; Sotgiu, Simone; Ouaj, Taoufiq; Stellino, Elena; Fasolato, Claudia; Postorino, Paolo; Metzelaars, Marvin; Kögerler, Paul; Beschoten, Bernd; Calandra, Matteo; Ortolani, Michele; Stampfer, Christoph; Mauri, Francesco; Baldassarre, Leonetta.
Afiliación
  • Graziotto L; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Macheda F; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Venanzi T; Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genoa, Italy.
  • Marchese G; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Sotgiu S; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Ouaj T; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Stellino E; JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany.
  • Fasolato C; Department of Physics and Geology, University of Perugia, Via Alessandro Pascoli, 06123 Perugia, Italy.
  • Postorino P; Institute for Complex Systems, National Research Council (ISC-CNR), 00185 Rome, Italy.
  • Metzelaars M; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Kögerler P; Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany.
  • Beschoten B; Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany.
  • Calandra M; JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany.
  • Ortolani M; Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genoa, Italy.
  • Stampfer C; Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo, Italy.
  • Mauri F; Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
  • Baldassarre L; JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany.
Nano Lett ; 24(6): 1867-1873, 2024 Feb 14.
Article en En | MEDLINE | ID: mdl-38306119
ABSTRACT
Few-layer graphene possesses low-energy carriers that behave as massive Fermions, exhibiting intriguing properties in both transport and light scattering experiments. Lowering the excitation energy of resonance Raman spectroscopy down to 1.17 eV, we target these massive quasiparticles in the split bands close to the K point. The low excitation energy weakens some of the Raman processes that are resonant in the visible, and induces a clearer frequency-separation of the substructures of the resonance 2D peak in bi- and trilayer samples. We follow the excitation-energy dependence of the intensity of each substructure, and comparing experimental measurements on bilayer graphene with ab initio theoretical calculations, we trace back such modifications on the joint effects of probing the electronic dispersion close to the band splitting and enhancement of electron-phonon matrix elements.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Estados Unidos