High resolution Compton scattering as a Probe of the Fermi surface in the Iron-based superconductor $LaO_{1-x}F_xFeAs$

TL;DR

This study uses high-resolution Compton scattering calculations to identify Fermi surface features in LaOFeAs, providing insights into its electronic structure relevant for understanding iron-based superconductivity.

Contribution

First principles all-electron calculations of Compton profiles reveal Fermi surface features in LaOFeAs, aiding experimental detection and analysis.

Findings

Identification of Fermi surface features in momentum density

Analysis of directional Compton profiles

Discussion on experimental observation challenges

Abstract

We have carried out first principles all-electron calculations of the (001)-projected 2D electron momentum density and the directional Compton profiles along the [100], [001] and [110] directions in the Fe-based superconductor LaOFeAs within the framework of the local density approximation. We identify Fermi surface features in the 2D electron momentum density and the directional Compton profiles, and discuss issues related to the observation of these features via Compton scattering experiments.