Spin-orbit interaction in curved graphene ribbons
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Título: | Spin-orbit interaction in curved graphene ribbons |
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Autor/es: | Gosálbez-Martínez, Daniel | Palacios Burgos, Juan José | 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: | Electronic properties | Electrons | Graphene ribbons | Zigzag edges | Spin-orbit interaction |
Área/s de conocimiento: | Física Aplicada | Física de la Materia Condensada |
Fecha de publicación: | 16-mar-2011 |
Editor: | American Physical Society |
Cita bibliográfica: | GOSÁLBEZ-MARTÍNEZ, D.; PALACIOS, J.J.; FERNÁNDEZ-ROSSIER, J. “Spin-orbit interaction in curved graphene ribbons”. Physical Review B. Vol. 83, No. 11 (2011). ISSN 1098-0121, pp. 115436-1/8 |
Resumen: | We study the electronic properties of electrons in flat and curved zigzag graphene nanoribbons using a tight-binding model within the Slater Koster approximation, including spin-orbit interaction. We find that a constant curvature across the ribbon dramatically enhances the action of the spin-orbit term, strongly influencing the spin orientation of the edge states: Whereas spins are normal to the surface in the case of flat ribbons, this is no longer the case for curved ribbons. This effect is very pronounced, the spins deviating from the normal to the ribbon, even for very small curvature and a realistic spin orbit coupling of carbon. We find that curvature results also in an effective second neighbor hopping that modifies the electronic properties of zigzag graphene ribbons. We discuss the implications of our findings in the spin Hall phase of curved graphene ribbons. |
Patrocinador/es: | This work has been financially supported by MEC-Spain (MAT07-67845, FIS2010-21883-C02-01, and CONSOLIDER CSD2007-00010) and Generalitat Valenciana (ACOMP/2010/070). |
URI: | http://hdl.handle.net/10045/25239 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.83.115436 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | ©2011 American Physical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.83.115436 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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