Effect of spin fluctuations on the electronic structure in iron-based superconductors
Andreas Heimes, Roland Grein, Matthias Eschrig
DOI 10.1103/PhysRevB.86.064528 · 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
Magnetic inelastic neutron scattering studies of iron-based superconductors reveal a strongly temperature-dependent spin-fluctuation spectrum in the normal conducting state, which develops a prominent low-energy resonance feature when entering the superconducting state. Angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling spectroscopy (STS) allow us to study the fingerprints of fluctuation modes via their interactions with electronic quasiparticles. We calculate such fingerprints in 122 iron pnictides using an experimentally motivated spin-fluctuation spectrum and make a number of predictions that can be tested in ARPES and STS experiments. This includes discussions of the quasiparticle scattering rate and the superconducting order parameter. In quantitative agreement with experiment we reproduce the quasiparticle dispersions obtained from momentum distribution curves as well as energy distribution curves. We discuss the relevance of the coupling between spin fluctuations and electronic excitations for the superconducting mechanism.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe1.85Co0.15As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Electronic Dispersion Anomalies in Iron Pnictide Superconductors
similarity 0.97Andreas Heimes et al.
Source status unknown — claims are unverified
K-Doping Dependence of the Fermi Surface of the Iron-Arsenic Ba1−xKxFe2As2 Superconductor Using Angle-Resolved Photoemission Spectroscopy
similarity 0.97Chang Liu et al.
Source status unknown — claims are unverified
Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
similarity 0.96J. T. Park et al.
Source status unknown — claims are unverified
Opening of the superconducting gap in the hole pockets of Ba(Fe1−xCox)2As2 as seen via angle-resolved photoelectron spectroscopy
similarity 0.96B. Mansart et al.
Source status unknown — claims are unverified
Extraordinary Doping Effects on Quasiparticle Scattering and Bandwidth in Iron-Based Superconductors
similarity 0.96Z. R. Ye et al.
Source status unknown — claims are unverified
Anisotropy of the pairing gap of FeAs-based superconductors induced by spin fluctuations
similarity 0.96Rastko Sknepnek et al.
Source status unknown — claims are unverified