Inter-electron interactions and the RKKY potential between H adatoms in graphene
arXiv:1703.05743 · doi:10.1103/PhysRevB.96.165411
Abstract
We use first-principles Quantum Monte-Carlo simulations to study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between hydrogen adatoms attached to a graphene sheet. We find that the pairwise RKKY interactions at distances of a few lattice spacings are strongly affected by inter-electron interactions, in particular, the potential barrier between widely separated adatoms and the dimer configuration becomes wider and thus harder to penetrate. We also point out that anti-ferrromagnetic and charge density wave orderings have very different effects on the RKKY interaction. Finally, we analyze the stability of several regular adatom superlattices with respect to small displacements of a single adatom, distinguishing the cases of adatoms which populate either both or only one sublattice of the graphene lattice.
7 pages, 8 figures, revised version accepted for publication in Phys. Rev. B
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Cited by in corpus (10)
- Hybrid-Monte-Carlo study of competing order in the extended fermionic Hubbard model on the hexagonal lattice
- Numerical evidence of conformal phase transition in graphene with long-range interactions
- A density of states approach to the hexagonal Hubbard model at finite density
- Schur complement solver for Quantum Monte-Carlo simulations of strongly interacting fermions
- A Hybrid-Monte-Carlo study of monolayer graphene with partially screened Coulomb interactions at finite spin density
- Kondo effect due to a hydrogen impurity in graphene: a multichannel Kondo problem with diverging hybridization
- Selective generation and amplification of RKKY interactions by P-N interface
- Quantum phase transitions on the hexagonal lattice
- Link auxiliary field method in the Extended Hubbard model
- Dynamic-RKKY induced time-reversal symmetry breaking and chiral spin liquids