Giant magnetoresistance in ultrasmall graphene based devices
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http://hdl.handle.net/10045/25255
Title: | Giant magnetoresistance in ultrasmall graphene based devices |
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Authors: | Muñoz Rojas, Federico | Fernández-Rossier, Joaquín | Palacios Burgos, Juan José |
Research Group/s: | Grupo de Nanofísica |
Center, Department or Service: | Universidad de Alicante. Departamento de Física Aplicada |
Keywords: | Spin-polarized electronic transport | Graphene | Magnetoresistance | Zigzag edges | Conductance |
Knowledge Area: | Física de la Materia Condensada |
Issue Date: | 3-Apr-2009 |
Publisher: | American Physical Society |
Citation: | 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 |
Abstract: | 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. |
Sponsor: | 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 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2009 The American Physical Society |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.102.136810 |
Appears in Collections: | INV - Grupo de Nanofísica - Artículos de Revistas |
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2009_PhysRevLett.102.136810.pdf | 594,26 kB | Adobe PDF | Open Preview | |
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