Hydrogenated graphene nanoribbons for spintronics
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Title: | Hydrogenated graphene nanoribbons for spintronics |
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Authors: | Soriano, David | 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: | Hydrogenation | Graphene nanoribbons | Spintronics |
Knowledge Area: | Física de la Materia Condensada |
Issue Date: | 5-Apr-2010 |
Publisher: | American Physical Society |
Citation: | SORIANO, D., et al. “Hydrogenated graphene nanoribbons for spintronics”. Physical Review B. Vol. 81, No. 16 (2010). ISSN 1098-0121, pp. 165409-1/7 |
Abstract: | We show how hydrogenation of graphene nanoribbons at small concentrations can open venues toward carbon-based spintronics applications regardless of any specific edge termination or passivation of the nanoribbons. Density-functional theory calculations show that an adsorbed H atom induces a spin density on the surrounding π orbitals whose symmetry and degree of localization depends on the distance to the edges of the nanoribbon. As expected for graphene-based systems, these induced magnetic moments interact ferromagnetically or antiferromagnetically depending on the relative adsorption graphene sublattice, but the magnitude of the interactions are found to strongly vary with the position of the H atoms relative to the edges. We also calculate, with the help of the Hubbard model, the transport properties of hydrogenated armchair semiconducting graphene nanoribbons in the diluted regime and show how the exchange coupling between H atoms can be exploited in the design of novel magnetoresistive devices. |
Sponsor: | This work has been financially supported by MICINN of Spain (Grants No. MAT07-67845 and CONSOLIDER No. CSD2007-00010). D.S. acknowledges financial support from Consejo Superior de Investigaciones Científicas (CSIC). |
URI: | http://hdl.handle.net/10045/25235 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.81.165409 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2010 The American Physical Society |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1103/PhysRevB.81.165409 |
Appears in Collections: | INV - Grupo de Nanofísica - Artículos de Revistas |
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2010_PhysRevB.81.165409.pdf | 864,94 kB | Adobe PDF | Open Preview | |
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