Ferrimagnetism in graphene
We show the existence of ferrimagnetic (FIM) ordering in n-type doped graphene on Au/Co interface with dislocation loops that are responsible for the uniform magnetizations on graphene sublattices. The synthesized system is promising for the realization of a circular dichroism Hall effect.Rybkin et al., Phys. Rev. Lett. 129, 226401 (2022).
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Using experimental and theoretical methods, 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 (FIM) ordering of moments in the two C sublattices. The band gap of ∼80 meV at the Dirac point is revealed by ARPES and DFT methods, and it is shown that the gap has a magnetic nature and exists for ferrimagnetic ordering. Tight-binding calculation results are in good agreement with the spin-ARPES data, showing the possibility for the synthesized system to implement the circular dichroism Hall effect. |
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![]() A.G. Rybkin, A.V. Tarasov, A.A. Rybkina, D.Yu. Usachov, A.E. Petukhov, A.V. Eryzhenkov, D.A. Pudikov, A.A. Gogina, I.I. Klimovskikh, G. Di Santo, L. Petaccia, A. Varykhalov, A.M. Shikin, Phys. Rev. Lett. 129, 226401 (2022). doi: 10.1103/PhysRevLett.129.226401 |
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