Influence of Lifshitz transitions and correlation effects on the scattering rates of the charge carriers in iron-based superconductors

TL;DR

This paper investigates how Lifshitz transitions and electron correlations influence charge carrier scattering in iron-based superconductors, revealing non-Fermi-liquid behavior and large mass enhancements, challenging traditional quantum critical point theories.

Contribution

It presents a theoretical model showing the combined effects of Lifshitz transitions and correlations on scattering rates, supported by comparison with experimental data.

Findings

Prediction of non-Fermi-liquid behavior near Lifshitz transitions

Observation of large mass enhancements of charge carriers

Implications for understanding unconventional superconductivity

Abstract

Minimum model calculations on the co-action of hole vanishing Lifshitz transitions and correlation effects in ferropnictides are presented. The calculations predict non-Fermi-liquid behaviour and huge mass enhancements of the charge carriers at the Fermi level. The findings are compared with recent ARPES experiments and with measurements of transport and thermal properties of ferropnictides. The results from the calculation can be also applied to other unconventional superconductors and question the traditional view of quantum critical points.