RT Journal Article
T1 Control of spin-polarised currents in graphene nanorings
A1 Saiz-Bretín, Marta
A1 Munarriz, J.
A1 Malyshev, Andrey
A1 Domínguez-Adame Acosta, Francisco
AB We study electronic transport in systems comprising square graphene nanorings with a ferromagnetic insulator layer on top of them. The rings are connected symmetrically or asymmetrically to contacts. The proximity exchange interaction of electrons with  agnetic ions results in spin-dependent transport properties. When a nanoring is connected asymmetrically, the occurrence of Fano-like antiresonances in the transmission coefficient can induce abrupt changes in the spin polarisation under minute variations of the Fermi energy. We also demonstrate that the spin polarization can be efficiently controlled by a side-gate voltage. This opens a possibility to use these effects for fabricating tunable sources of polarised electrons.
PB Elsevier
SN 0375-9601
YR 2015
FD 2015-09-25
LK https://hdl.handle.net/20.500.14352/24181
UL https://hdl.handle.net/20.500.14352/24181
LA eng
NO ©Elsevier.F. D-A. thanks the Theoretical Physics Group of the University of Warwick for the warm hospitality and the Spanish Ministry of Education (grant PRX14/00129). This work was supported by MINECO (project MAT2013-46308). A. V. M. was partially supported by CAPES (grant PVE-A121).
NO Spanish Ministry of Education
NO MINECO
NO CAPES
DS Docta Complutense
RD 30 dic 2025