High-temperature superconductivity in iron pnictides and chalcogenides emerges when a
magnetic phase is suppressed. The multi-orbital character and the strength of correlations …

Electron correlations play a central role in iron-based superconductors. In these systems,
multiple Fe 3 d-orbitals are active in the low-energy physics, and they are not all degenerate …

The theoretical need to study the properties of the Fe-based high-T c superconductors using
reliable many-body techniques has highlighted the importance of determining what is the …

The role of Coulomb correlations in the iron pnictide LaFeAsO is studied by generalizing
exact diagonalization dynamical mean-field theory to five orbitals. For rotationally invariant …

Despite having the simplest atomic structure, bulk FeSe has an observed electronic structure
with the largest deviation from the band theory predictions among all Fe-based …

A recently proposed two-orbital model for the Fe-based superconductors is studied using the
Lanczos method on small clusters as well as pairing mean-field approximations. Our main …

Recent experimental developments in the iron pnictides have unambiguously demonstrated
the existence of in-plane electronic anisotropy in the absence of the long-range magnetic …

Recent experiments on iron pnictides have uncovered a large in-plane resistivity anisotropy
with a surprising result: The system conducts better in the antiferromagnetic x direction than …

Motivated by the iron pnictides, we examine the spin excitations in an itinerant
antiferromagnet where a spin-density wave (SDW) originates from an excitonic instability of …

We report an infrared optical study of the pnictide high-temperature superconductor BaFe
1.84 Co 0.16 As 2 and its parent compound BaFe 2 As 2. We demonstrate that electronic …