Quantum transport through single and multilayer icosahedral fullerenes

 

Autores
Lovey, Daniel Adrián; Romero, Rodolfo Horacio
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2013
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
We use a tight-binding Hamiltonian and Green functions methods to calculate the quantum transmission through single-wall fullerenes and bilayered and trilayered onions of icosahedral symmetry attached to metallic leads. The electronic structure of the onion-like fullerenes takes into account the curvature and finite size of the fullerenes layers as well as the strength of the intershell interactions depending on to the number of interacting atom pairs belonging to adjacent shells.  
Misalignment of the symmetry axes of the concentric iscosahedral shells produces breaking of the level degeneracies of the individual shells, giving rise some narrow quasi-continuum bands instead of the localized discrete peaks of the individual fullerenes. As a result, the transmission function for non symmetrical onions are rapidly varying functions of the Fermi energy. Furthermore, we found that most of the features of the transmission through the onions are due to the electronic structure of the outer shell with additional Fano-like antiresonances arising from coupling with or between the inner shells.
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/2427
Enlace del recurso
http://hdl.handle.net/11336/2427
Nivel de acceso
Acceso abierto
Materia
QUANTUM TRANSMISSION
BUCKYONIONS
TIGHT BINDING
FULLERENES
Física de los Materiales Condensados
Ciencias Físicas
CIENCIAS NATURALES Y EXACTAS