Electronic, magnetic, and structural phase inhomogeneities are ubiquitous in strongly
correlated quantum materials. The characteristic length scales of the phase inhomogeneities …

Despite decades of intense research, the origin of high-temperature superconductivity in
cuprates and iron-based compounds is still a mystery. Magnetism and superconductivity are …

We study the symmetry of spin excitation spectra in 122-ferropnictide superconductors by
comparing the results of first-principles calculations with inelastic neutron-scattering (INS) …

The transport and complex optical properties of the electron-doped iron-arsenic
superconductor BaFe 1.85 Co 0.15 As 2 with T c= 25 K have been examined in the Fe-As …

We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe
2 As 2 family. Our experiments have identified hallmarks of the pseudogap state in the BaFe …

We report muon spin rotation (μ SR) and infrared spectroscopy experiments on underdoped
BaFe 1.89 Co 0.11 As 2 which show that bulk magnetism and superconductivity (SC) coexist …

The electrodynamic properties of Ba (Fe 0.92 Co 0.08) 2 As 2 and Ba (Fe 0.95 Ni 0.05) 2 As
2 single crystals have been investigated by reflectivity measurements in a wide frequency …

We have measured the complex dynamical conductivity, σ= σ 1+ i σ 2, of superconducting
Ba (Fe 0.9 Co 0.1) 2 As 2 (T c= 22 K) at terahertz frequencies and temperatures 2–30 K. In …

We analyze the outcomes of an extended-Drude-model approach to the optical spectra of
pnictides, where the multiband nature of the electronic excitations requires a careful analysis …

We study the dynamical quasiparticle scattering by spin and charge fluctuations in Fe-based
pnictides within a five-orbital model with on-site interactions. The leading contribution to the …