Electrical spin manipulation in graphene nanostructures
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Título: | Electrical spin manipulation in graphene nanostructures |
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Autor/es: | Ortiz-Cano, Ricardo | García-Martínez, N.A. | Lado, Jose L. | Fernández-Rossier, Joaquín |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Graphene | Nanostructures | Electrical spin manipulation |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 17-may-2018 |
Editor: | American Physical Society |
Cita bibliográfica: | Physical Review B. 2018, 97: 195425. doi:10.1103/PhysRevB.97.195425 |
Resumen: | We propose a mechanism to drive singlet-triplet spin transitions electrically in a wide class of graphene nanostructures that present pairs of in-gap zero modes, localized at opposite sublattices. Examples are rectangular nanographenes with short zigzag edges, armchair ribbon heterojunctions with topological in-gap states, and graphene islands with sp3 functionalization. The interplay between the hybridization of zero modes and the Coulomb repulsion leads to symmetric exchange interaction that favors a singlet ground state. Application of an off-plane electric field to the graphene nanostructure generates an additional Rashba spin-orbit coupling, which results in antisymmetric exchange interaction that mixes S=0 and S=1 manifolds. We show that modulation in time of either the off-plane electric field or the applied magnetic field permits performing electrically driven spin resonance in a system with very long spin-relaxation times. |
Patrocinador/es: | This work has been financially supported, in part, by FEDER funds. We acknowledge financial support from Marie-Curie-ITN Grant No. 607904-SPINOGRAPH, FCT, under the Projects No. PTDC/FIS-NAN/4662/2014 and No. PTDC/FISNAN/3668/2014, and MINECO-Spain (Grant No. MAT2016-78625-C2). |
URI: | http://hdl.handle.net/10045/76227 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.97.195425 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | ©2018 American Physical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1103/PhysRevB.97.195425 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
Archivos en este ítem:
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2018_Ortiz_etal_PhysRevB.pdf | 1,8 MB | Adobe PDF | Abrir Vista previa | |
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