Noncollinear magnetic phases and edge states in graphene quantum Hall bars
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http://hdl.handle.net/10045/54252
Título: | Noncollinear magnetic phases and edge states in graphene quantum Hall bars |
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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 | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Noncollinear magnetic phases | Edge states | Graphene | Quantum Hall bars |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 21-oct-2014 |
Editor: | American Physical Society |
Cita bibliográfica: | Physical Review B. 2014, 90: 165429. doi:10.1103/PhysRevB.90.165429 |
Resumen: | Application of a perpendicular magnetic field to charge neutral graphene is expected to result in a variety of broken symmetry phases, including antiferromagnetic, canted, and ferromagnetic. All these phases open a gap in bulk but have very different edge states and noncollinear spin order, recently confirmed experimentally. Here we provide an integrated description of both edge and bulk for the various magnetic phases of graphene Hall bars making use of a noncollinear mean field Hubbard model. Our calculations show that, at the edges, the three types of magnetic order are either enhanced (zigzag) or suppressed (armchair). Interestingly, we find that preformed local moments in zigzag edges interact with the quantum spin Hall like edge states of the ferromagnetic phase and can induce backscattering. |
Patrocinador/es: | We acknowledge financial support by Marie-Curie-ITN 607904-SPINOGRAPH. J.F.R. acknowledges financial support by Generalitat Valenciana (ACOMP/2010/070), Framework Programme FP7/2007-2013/ under REA Grant Agreement No. 607904-13, Prometeo. |
URI: | http://hdl.handle.net/10045/54252 |
ISSN: | 0163-1829 (Print) | 1095-3795 (Online) |
DOI: | 10.1103/PhysRevB.90.165429 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2014 American Physical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.90.165429 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas Investigaciones financiadas por la UE |
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2014_Lado_etal_PhysRevB.pdf | 1,35 MB | Adobe PDF | Abrir Vista previa | |
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