High-temperature superconductivity in the iron-based materials emerges from, or sometimes
coexists with, their metallic or insulating parent compound states. This is surprising, as these …

High-transition temperature (high-T c) superconductivity in the iron pnictides or
chalcogenides emerges from the suppression of the static antiferromagnetic order in their …

We study electronic instabilities of a kagome metal with a Fermi energy close to saddle
points at the hexagonal Brillouin zone face centers. Using parquet renormalization group …

The superconductor iron selenide (FeSe) is of intense interest owing to its unusual
nonmagnetic nematic state and potential for high-temperature superconductivity. But its …

Within the Landau paradigm of continuous phase transitions, ordered states of matter are
characterized by a broken symmetry. Although the broken symmetry is usually evident …

Iron-based superconductors are well known for their complex interplay between structure,
magnetism and superconductivity. FeSe offers a particularly fascinating example. This …

Starting from a microscopic itinerant model, we derive and analyze the effective low-energy
model for collective magnetic excitations in the iron pnictides. We show that the stripe …

We study the mechanism of orbital or spin fluctuations due to multiorbital Coulomb
interaction in<? format?> iron-based superconductors, going beyond the random-phase …

Understanding the microscopic origins of electronic phases in high-transition temperature
(high-T c) superconductors is important for elucidating the mechanism of superconductivity …

We investigate how emergent nematic order and nematic fluctuations affect several
macroscopic properties of both the normal and superconducting states of the iron pnictides …