https://doi.org/10.1140/epjp/s13360-024-05317-6
Regular Article
Ruderman–Kittel–Kasuya–Yosida-like interactions of plaquette-type arranged magnetic inclusions on graphene
Quantum Simulators Research Laboratory, Institute of Physics, Kazan Federal University, Kremlyovskaya Str. 18, 420008, Kazan, Russian Federation
a
airatphd@kazanfederaluniversity.ru
Received:
18
March
2024
Accepted:
27
May
2024
Published online:
10
June
2024
We report on the exchange interaction between two Fe adatoms on graphene using density functional theory (DFT). We consider the plaquette configuration of Fe adatoms along the zig-zag direction of graphene and calculate the energy difference between ferromagnetic (FM) and antiferromagnetic (AFM) states as a function of separation distance. We find that the magnetic coupling between the adatoms exhibits RKKY-like sign changing oscillations with a period of two lattice constants and a decay rate of 
. We also calculate the magnetization density and show that the magnetic moments of Fe adatoms and graphene are weakly coupled and depend on the separation distance and configuration. Our results provide new insights into the exchange interaction between magnetic impurities in graphene and suggest possible applications in spintronics.
Airat Kiiamov and Maksim Kuznetsov have contributed equally to this work.
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