Response to I. I. Mazin's correspondence on "Electronic correlations in the iron pnictides"

TL;DR

This paper examines the mismatch between experimental optical measurements and theoretical calculations in iron-based superconductors, attributing the discrepancy mainly to electronic correlation effects causing mass renormalization.

Contribution

It highlights the importance of electronic correlations in explaining optical properties, providing insights into the physics of iron pnictides.

Findings

Measured optical Drude weight is lower than band structure predictions.

Mass renormalization due to electronic correlations explains the discrepancy.

Electronic correlations significantly influence optical responses in iron pnictides.

Abstract

We discuss the discrepancy between the measured optical Drude weight and band structure calculations in LaFePO and other iron-based superconductors. This discrepancy is mostly due to mass renormalization arising from electronic correlation effects.