RKKY interaction in the spin-density-wave phase of iron-based superconductors

Alireza Akbari; Ilya Eremin; Peter Thalmeier

doi:10.1103/PhysRevB.84.134513

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RKKY interaction in the spin-density-wave phase of iron-based superconductors

Alireza Akbari, Ilya Eremin, Peter Thalmeier

DOI 10.1103/PhysRevB.84.134513 · Physical Review B

T1

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Abstract

Using the multiband model we analyze the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between the magnetic impurities in layered ferropnictide superconductors. In the normal state the interaction is spin isotropic and is dominated by the nesting features of the electron and hole bands separated by the antiferromagnetic (AF) momentum, QAF. In the AF state the RKKY interaction maps into an effective anisotropic XXZ-type Heisenberg exchange model. The anisotropy originates from the breaking of the spin-rotational symmetry induced by the AF order and its strength depends on the size of the AF gap and the structure of the folded Fermi surface. We discuss our results in connection with recent experiments.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
EuFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown