Anisotropic intrinsic spin relaxation in graphene due to flexural distortions
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http://hdl.handle.net/10045/33600
Títol: | Anisotropic intrinsic spin relaxation in graphene due to flexural distortions |
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Autors: | Fratini, Simone | Gosálbez-Martínez, Daniel | Merodio Cámara, Pablo | Fernández-Rossier, Joaquín |
Grups d'investigació o GITE: | Grupo de Nanofísica |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Física Aplicada |
Paraules clau: | Intrinsic spin scattering mechanism | Graphene | Flexural distortions |
Àrees de coneixement: | Física de la Materia Condensada |
Data de publicació: | 20-de setembre-2013 |
Editor: | American Physical Society |
Citació bibliogràfica: | Phys. Rev. B. 2013, 88: 115426 [7 pages]. doi:10.1103/PhysRevB.88.115426 |
Resum: | We propose an intrinsic spin scattering mechanism in graphene originated by the interplay of atomic spin-orbit interaction and the local curvature induced by flexural distortions of the atomic lattice. Starting from a multiorbital tight-binding Hamiltonian with spin-orbit coupling considered nonperturbatively, we derive an effective Hamiltonian for the spin scattering of the Dirac electrons due to flexural distortions. We compute the spin lifetime due to both flexural phonons and ripples and we find values in the microsecond range at room temperature. Interestingly, this mechanism is anisotropic on two counts. First, the relaxation rate is different for off-plane and in-plane spin quantization axis. Second, the spin relaxation rate depends on the angle formed by the crystal momentum with the carbon-carbon bond. In addition, the spin lifetime is also valley dependent. The proposed mechanism sets an upper limit for spin lifetimes in graphene and will be relevant when samples of high quality can be fabricated free of extrinsic sources of spin relaxation. |
Patrocinadors: | This work has been financially supported by MEC-Spain (GrantsNo. FIS2010-21883-C02-01, No. FIS2009-08744, and No. CONSOLIDER CSD2007-0010) and European Union, as well as Generalitat Valenciana, grant Prometeo 2012-11. |
URI: | http://hdl.handle.net/10045/33600 |
ISSN: | 1098-0121 (Print) | 1550-235X (Online) |
DOI: | 10.1103/PhysRevB.88.115426 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | ©2013 American Physical Society |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1103/PhysRevB.88.115426 |
Apareix a la col·lecció: | INV - Grupo de Nanofísica - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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PhysRevB.88.115426.pdf | 1,02 MB | Adobe PDF | Obrir Vista prèvia | |
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