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Título:
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Spin-dependent terahertz oscillator based on hybrid graphene superlattices
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Autores:
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Díaz García, Elena ;
Miralles, K. ;
Domínguez-Adame Acosta, Francisco ;
Gaul, Christopher
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Tipo de documento:
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texto impreso
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Editorial:
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American Institute of Physics, 2014-09-08
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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We theoretically study the occurrence of Bloch oscillations in biased hybrid graphene systems with spin-dependent superlattices. The spin-dependent potential is realized by a set of ferromagnetic insulator strips deposited on top of a gapped graphene nanoribbon, which induce a proximity exchange splitting of the electronic states in the graphene monolayer. We numerically solve the Dirac equation and study Bloch oscillations in the lowest conduction band of the spin-dependent superlattice. While the Bloch frequency is the same for both spins, we find the Bloch amplitude to be spin dependent. This difference results in a spin-polarized ac electric current in the THz range.
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En línea:
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https://eprints.ucm.es/id/eprint/29544/1/1804.pdf
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