Impurity states in the quantum spin Hall phase in graphene
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Título: | Impurity states in the quantum spin Hall phase in graphene |
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Autor/es: | González, Jhon W. | 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 spin Hall phase | Impurity states | Graphene |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 21-sep-2012 |
Editor: | American Physical Society |
Cita bibliográfica: | GONZÁLEZ, Jhon W.; FERNÁNDEZ-ROSSIER, J. “Impurity states in the quantum spin Hall phase in graphene”. Physical Review B. Vol. 86, No. 11 (2012). ISSN 1098-0121, pp. 115327-1/5 |
Resumen: | Two-dimensional insulators with time-reversal symmetry can have two topologically different phases, the quantum spin Hall and the normal phase. The former is revealed by the existence of conducting edge states that are topologically protected. Here we show that the reaction to impurity, in bulk, is radically different in the two phases and can be used as a marker for the topological phase. Within the context of the Kane-Mele model for graphene, we find that strictly normalizable in-gap impurity states only occur in the quantum spin Hall phase and carry a dissipationless current whose chirality is determined by the spin and pseudospin of the residing electron. |
Patrocinador/es: | This work has been financially supported by MEC-Spain (Grant Nos. FIS2010-21883-C02-01, FIS2009-08744, and CONSOLIDER CSD2007-0010) as well as Generalitat Valenciana, grant no. Prometeo 2011-12. |
URI: | http://hdl.handle.net/10045/25243 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.86.115327 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | ©2012 American Physical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.86.115327 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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