Magneto-elasto-resistivity in FeSe

TL;DR

This study investigates how strain and magnetic fields influence electrical resistivity in FeSe, revealing that a multiband model effectively describes its magneto-elasto-transport behavior across different phases.

Contribution

The paper introduces a minimal multiband Boltzmann model to analytically describe magneto-elasto-resistivity in FeSe, bridging experimental data with theoretical understanding.

Findings

Multiband framework accurately describes magneto-elasto-transport in FeSe.

Analytical expressions fit experimental data in both paramagnetic and nematic phases.

Strain and magnetic field effects are interconnected in FeSe's transport properties.

Abstract

FeSe stands out among iron-based superconductors due to its extended nematic phase without the onset of long-range magnetic order. While strain-dependent electrical resistivity has been extensively explored to probe nematicity, its influence on magneto-transport properties remains less understood. In this work, we present measurements of the magneto-elasto-resistivity in FeSe as a function of temperature and applied magnetic field. Using a minimal multiband Boltzmann model for transport we derive analytical expressions that capture the magnetic behavior of the whole set of experimental data both in the paramagnetic and in the nematic phase. These findings indicate that a multiband framework can robustly describe the magneto-elasto-transport properties in FeSe and arguably in other iron-based superconductors.