Magnetic impurity resonance states and symmetry of the superconducting order parameter in iron-based superconductors
Alireza Akbari, Ilya Eremin, Peter Thalmeier
DOI 10.1103/PhysRevB.81.014524 · Physical Review B
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Abstract
We investigate the effect of magnetic impurities on the local quasiparticle density of states in iron-based superconductors. Employing the two-orbital model where 3d electron and hole conduction bands are hybridizing with the localized f orbital of the impurity spin, we investigate how various symmetries of the superconducting gap and its nodal structure influence the quasiparticle excitations and impurity bound states. We show that the bound states behave qualitatively different for each symmetry. Most importantly we find that the impurity-induced bound states can be used to identify the nodal structure of the extended s-wave symmetry (S±) that is actively discussed in ferropnictides.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaFe2(As1-xPx)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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