Quantum anomalous Hall effect in graphene coupled to skyrmions
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Título: | Quantum anomalous Hall effect in graphene coupled to skyrmions |
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Autor/es: | 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: | Quantum anomalous Hall effect | Graphene | Skyrmions |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 21-sep-2015 |
Editor: | American Physical Society |
Cita bibliográfica: | Phys. Rev. B 92, 115433. doi:10.1103/PhysRevB.92.115433 |
Resumen: | Skyrmions are topologically protected spin textures, characterized by a topological winding number N, that occur spontaneously in some magnetic materials. Recent experiments have demonstrated the capability to grow graphene on top Fe/Ir, a system that exhibits a two-dimensional skyrmion lattice. Here we show that a weak exchange coupling between the Dirac electrons in graphene and a two-dimensional skyrmion lattice withN = ±1 drives graphene into a quantum anomalous Hall phase, with a band gap in bulk, a Chern number C = 2N, and chiral edge states with perfect quantization of conductance G = 2N e2 h . Our findings imply that the topological properties of the skyrmion lattice can be imprinted in the Dirac electrons of graphene. |
Patrocinador/es: | J.F.R. acknowledges financial support by MEC-Spain (Grant No. FIS2013-47328-C2-2-P) and Generalitat Valenciana (Grant No. ACOMP/2010/070), Prometeo. This work has been financially supported in part by FEDER funds. We acknowledge financial support by Marie-Curie-ITN Grant No. 607904-SPINOGRAPH. |
URI: | http://hdl.handle.net/10045/49928 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.92.115433 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | ©2015 American Physical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.92.115433 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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2015_Lado_Fernandez_PhysRevB.pdf | 1,97 MB | Adobe PDF | Abrir Vista previa | |
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