English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/143540
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Overtones of interlayer shear modes in the phonon-assisted emission spectrum of hexagonal boron nitride

AutorVuong, T. Q P; Cassabois, Guillaume; Valvin, Pierre; Jacques, Vincent L R; Cuscó, Ramón ; Artús, Lluís ; Gil, Bernard
Fecha de publicación2017
EditorAmerican Physical Society
CitaciónPhysical Review B - Condensed Matter and Materials Physics, 95(4): Article number 045207 (2017)
ResumenWe address the intrinsic optical properties of hexagonal boron nitride in deep ultraviolet. We show that the fine structure of the phonon replicas arises from overtones involving up to six low-energy interlayer shear modes. These lattice vibrations are specific to layered compounds since they correspond to the shear rigid motion between adjacent layers, with a characteristic energy of about 6-7 meV. We obtain a quantitative interpretation of the multiplet observed in each phonon replica under the assumption of a cumulative Gaussian broadening as a function of the overtone index, and with a phenomenological line broadening taken identical for all phonon types. We show from our quantitative interpretation of the full emission spectrum above 5.7 eV that the energy of the involved phonon mode is 6.8±0.5 meV, in excellent agreement with temperature-dependent Raman measurements of the low-energy interlayer shear mode in hexagonal boron nitride. We highlight the unusual properties of this material where the optical response is tailored by the phonon group velocities in the middle of the Brillouin zone. © 2017 American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.95.045207
URIhttp://hdl.handle.net/10261/143540
DOI10.1103/PhysRevB.95.045207
ISSN1098-0121
E-ISSN1550-235X
Aparece en las colecciones: (ICTJA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Cusco_PhysRevB_95_045207.pdf476,35 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.