Electronic and magnetic properties of Gr/Fe/Ir(111) heterostructure
ORAL
Abstract
Coupling Graphene with ferromagnetic systems opens perspectives of efficient injection of spin-polarized electrons in devices. We investigate a well-defined heterostructure constituted by magnetic Fe layers intercalated between graphene (Gr) and Ir(111). Fe-C solubility and Fe-Ir intermixing were avoided by atomic controlled Fe-intercalation at moderate temperature. DFT calculations and ARPES measurements show the redistribution of the electronic states due to the graphene/metal hybridization with a downshift in energy of the Dirac cone and Fe states in the energy region just below the Fermi level. X-Ray Magnetic Circular Dichroism reveals the strong ferromagnetic response of the confined Fe with enhanced spin- and orbital- moments with respect to bcc-Fe bulk. Graphene acts not only as a protective membrane, but also promotes the ferromagnetic order on the Fe layer.
*The authors acknowledge support from the MaX – MAterials design at the eXascale – Centre of Excellence, funded by the European Union program H2020-INFRAEDI-2018-1 (Grant No. 824143); SUPER (Supercomputing Unified Platform- Emilia-Romagna) from Emilia-Romagna POR-FESR2014-2020 regional funds; computational time provided by the Italian ISCRA program.
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Presenters
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Claudia Cardoso
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche
- CNR-Istituto Nanoscienze