Quantum anomalous Hall effect in graphene coupled to skyrmions
Contribuinte(s) |
Universidad de Alicante. Departamento de Física Aplicada Grupo de Nanofísica |
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Data(s) |
02/10/2015
02/10/2015
21/09/2015
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Resumo |
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. 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. |
Identificador |
Phys. Rev. B 92, 115433. doi:10.1103/PhysRevB.92.115433 1098-0121 (Print) 1550-235X (Online) http://hdl.handle.net/10045/49928 10.1103/PhysRevB.92.115433 |
Idioma(s) |
eng |
Publicador |
American Physical Society |
Relação |
http://dx.doi.org/10.1103/PhysRevB.92.115433 |
Direitos |
©2015 American Physical Society info:eu-repo/semantics/openAccess |
Palavras-Chave | #Quantum anomalous Hall effect #Graphene #Skyrmions #Física de la Materia Condensada |
Tipo |
info:eu-repo/semantics/article |