Impact of local-moment fluctuations on the magnetic degeneracy of iron arsenide superconductors
Xiaoyu Wang, Rafael M. Fernandes
DOI 10.1103/PhysRevB.89.144502 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We investigate the fate of the orthorhombic stripe-type magnetic state [ordering vectors (π,0)/(0,π)], observed in most iron-pnictide superconductors, in the presence of localized magnetic moments that tend to form a Néel state [ordering vector (π,π)]. We show that before long-range Néel order sets in, the coupling between the conduction electrons and the fluctuations of the local moments favors an unusual magnetic state consisting of a coherent superposition of the (π,0) and (0,π) orders that preserves tetragonal symmetry. The magnetization of this state is nonuniform and induces a simultaneous checkerboard charge order. We discuss signatures of this magnetic configuration on the electronic spectrum and its impact on the superconducting state, showing that its phase space for coexistence with the s+− state is smaller than the stripe-type state. Our results shed light on recent experimental observations on Ba(Fe1−xMnx)2As2 compounds, where the Néel-type local Mn moments interact with the Fe conduction electrons.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe1-xMnx)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Disorder effects in multiorbital s±-wave superconductors: Implications for Zn-doped BaFe2As2 compounds
similarity 0.97Hua Chen et al.
Source status unknown — claims are unverified
Non-Fermi-liquid transport phenomena and superconductivity driven by orbital fluctuations in iron pnictides: Analysis by fluctuation-exchange approximation
similarity 0.97Seiichiro Onari & Hiroshi Kontani
Source status unknown — claims are unverified
Enhancement of Magnetic Stripe Order in Iron-Pnictide Superconductors from the Interaction between Conduction Electrons and Magnetic Impurities
similarity 0.97Maria N. Gastiasoro & Brian M. Andersen
Source status unknown — claims are unverified
Anomalous thermodynamic power laws near topological transitions in nodal superconductors
similarity 0.97B. Mazidian et al.
Source status unknown — claims are unverified
Scaling between Magnetic and Lattice Fluctuations in Iron Pnictide Superconductors
similarity 0.97Rafael M. Fernandes et al.
Source status unknown — claims are unverified
Impact of disorder on the superconducting transition temperature near a Lifshitz transition
similarity 0.97Thaís V. Trevisan et al.
Source status unknown — claims are unverified