Electronic structure and possible pseudogap behavior in iron based superconductors

TL;DR

This paper explores the electronic structure of iron-based superconductors, highlighting how antiferromagnetic scattering and doping influence the Fermi surface and pseudogap phenomena, aligning theoretical models with experimental observations.

Contribution

It introduces a simplified analytic model to describe the electronic spectrum near the Fermi level, accounting for AFM scattering and doping effects in iron-based superconductors.

Findings

Pseudogap behavior linked to partial Fermi surface destruction.

Evolution of electronic spectrum and Fermi surfaces with doping.

Qualitative agreement with ARPES experimental data.

Abstract

Starting from the simplified analytic model of electronic spectrum of iron - pnictogen (chalcogen) high - temperature superconductors close to the Fermi level, we discuss the influence of antiferromagneting (AFM)scattering both for stoichiometric case and the region of possible short - range order AFM fluctuations in doped compounds. Qualitative picture of the evolution of electronic spectrum and Fermi surfaces (FS) for different dopings is presented, with the aim of comparison with existing and future ARPES experiments. Both electron and hole dopings are considered and possible pseudogap behavior connected with partial FS "destruction" is demonstrated, explaining some recent experiments.