Rybkin, A.G.; Tarasov, A.V.; Rybkina, A.A.; Usachov, D.Y.; Petukhov, A.E.; Eryzhenkov, A.V.; Pudikov, D.A.; Gogina, A.A.; Klimovskikh, I.I.; Di Santo, G.; Petaccia, L.; Varykhalov, A.; Shikin, A.M.: Sublattice Ferrimagnetism in Quasifreestanding Graphene. Physical Review Letters 129 (2022), p. 226401/1-6
10.1103/physrevlett.129.226401
Abstract:
We show that graphene can be magnetized by coupling to a ferromagnetic Co film through a Au monolayer. The presence of dislocation loops under graphene leads to a ferrimagnetic ordering of moments in the two C sublattices. It is shown that the band gap of ∼80 meV in the ¯¯¯¯K point has a magnetic nature and exists for ferrimagnetic ordering. Interplay between Rashba and exchange couplings is evidenced by spin splitting asymmetry in spin-ARPES measurements and fully supported by DFT calculation of a (9×9) unit cell. Owing to sign-opposite Berry curvatures for ¯¯¯¯K and ¯¯¯¯K′ valleys, the synthesized system is promising for the realization of a circular dichroism Hall effect.