Giant magnetoresistance in ultrasmall graphene based devices
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Título: | Giant magnetoresistance in ultrasmall graphene based devices |
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Autor/es: | Muñoz Rojas, Federico | 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: | Spin-polarized electronic transport | Graphene | Magnetoresistance | Zigzag edges | Conductance |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 3-abr-2009 |
Editor: | American Physical Society |
Cita bibliográfica: | MUÑOZ-ROJAS, F.; FERNÁNDEZ-ROSSIER, J.; PALACIOS, J.J. “Giant magnetoresistance in ultrasmall graphene based devices”. Physical Review Letters. Vol. 102, No. 13 (3 Apr. 2009). ISSN 0031-9007, pp. 136810-1/4 |
Resumen: | By computing spin-polarized electronic transport across a finite zigzag graphene ribbon bridging two metallic graphene electrodes, we demonstrate, as a proof of principle, that devices featuring 100% magnetoresistance can be built entirely out of carbon. In the ground state a short zigzag ribbon is an antiferromagnetic insulator which, when connecting two metallic electrodes, acts as a tunnel barrier that suppresses the conductance. The application of a magnetic field makes the ribbon ferromagnetic and conductive, increasing dramatically the current between electrodes. We predict large magnetoresistance in this system at liquid nitrogen temperature and 10 T or at liquid helium temperature and 300 G. |
Patrocinador/es: | This work has been financially supported by MEC-Spain (Grants No. MAT07-67845, No. MAT07-31099-E, and CONSOLIDER CSD2007-0010). |
URI: | http://hdl.handle.net/10045/25255 |
ISSN: | 0031-9007 (Print) | 1079-7114 (Online) |
DOI: | 10.1103/PhysRevLett.102.136810 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2009 The American Physical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.102.136810 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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