%0 Journal Article
%A Díaz García, Elena
%A Miralles, K.
%A Domínguez-Adame Acosta, Francisco
%A Gaul, Christopher
%T Spin-dependent terahertz oscillator based on hybrid graphene superlattices
%D 2014
%@ 0003-6951
%U https://hdl.handle.net/20.500.14352/33978
%X 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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