Coherent transport in graphene nanoconstrictions
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/25226
Título: | Coherent transport in graphene nanoconstrictions |
---|---|
Autor/es: | Muñoz Rojas, Federico | Jacob, David | Fernández-Rossier, Joaquín | Palacios Burgos, Juan José |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Coherent transport | Structural nanoconstriction | Graphene | Quantum dots |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 14-nov-2006 |
Editor: | American Physical Society |
Cita bibliográfica: | MUÑOZ-ROJAS, F., et al. “Coherent transport in graphene nanoconstrictions”. Physical Review B. Vol. 74, No. 19 (2006). ISSN 1098-0121, pp. 195417-1/8 |
Resumen: | We study the effect of a structural nanoconstriction on the coherent transport properties of otherwise ideal zigzag-edged infinitely long graphene ribbons. The electronic structure is calculated with the standard one-orbital tight-binding model and the linear conductance is obtained using the Landauer formula. We find that, since the zero-bias current is carried in the bulk of the ribbon, this is very robust with respect to a variety of constriction geometries and edge defects. In contrast, the curve of zero-bias conductance versus gate voltage departs from the (2n+1)e2∕h staircase of the ideal case as soon as a single atom is removed from the sample. We also find that wedge-shaped constrictions can present nonconducting states fully localized in the constriction close to the Fermi energy. The interest of these localized states in regards to the formation of quantum dots in graphene is discussed. |
Patrocinador/es: | This work has been financially supported by MEC-Spain (Grants No. FIS200402356, No. MAT2005-07369-C03-01, and the Ramon y Cajal Program) and by Generalitat Valenciana (GV05-152). This work has been partly funded by FEDER funds. |
URI: | http://hdl.handle.net/10045/25226 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.74.195417 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2006 The American Physical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.74.195417 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
2006_PhysRevB.74.195417.pdf | 665,17 kB | Adobe PDF | Abrir Vista previa | |
Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.